1155563136 has 384 divisors, whose sum is σ = 4176157440. Its totient is φ = 298598400.

The previous prime is 1155563131. The next prime is 1155563177. The reversal of 1155563136 is 6313655511.

1155563136 is a `hidden beast` number, since 1 + 15 + 5 + 5 + 631 + 3 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a super-2 number, since 2×1155563136² = 2670652322564308992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1155563136.

It is not an unprimeable number, because it can be changed into a prime (1155563131) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7652661 + ... + 7652811.

It is an arithmetic number, because the mean of its divisors is an integer number (10875410).

Almost surely, 2^1155563136 is an apocalyptic number.

1155563136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1155563136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2088078720).

1155563136 is an abundant number, since it is smaller than the sum of its proper divisors (3020594304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1155563136 is a wasteful number, since it uses less digits than its factorization.

1155563136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 249 counting only the distinct ones).

The product of its digits is 40500, while the sum is 36.

The square root of 1155563136 is about 33993.5749223291. The cubic root of 1155563136 is about 1049.3762390470.

It can be divided in two parts, 11555 and 63136, that added together give a triangular number (74691 = T₃₈₆).

The spelling of 1155563136 in words is "one billion, one hundred fifty-five million, five hundred sixty-three thousand, one hundred thirty-six".