1155652061550 has 144 divisors (see below), whose sum is σ = 3335547975552. Its totient is φ = 264021508800.

The previous prime is 1155652061503. The next prime is 1155652061573. The reversal of 1155652061550 is 551602565511.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 15625959 + ... + 15699741.

It is an arithmetic number, because the mean of its divisors is an integer number (23163527608).

Almost surely, 2^{1155652061550} is an apocalyptic number.

1155652061550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1155652061550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1667773987776).

1155652061550 is an abundant number, since it is smaller than the sum of its proper divisors (2179895914002).

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

1155652061550 is a wasteful number, since it uses less digits than its factorization.

1155652061550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75943 (or 75931 counting only the distinct ones).

The product of its (nonzero) digits is 225000, while the sum is 42.

The spelling of 1155652061550 in words is "one trillion, one hundred fifty-five billion, six hundred fifty-two million, sixty-one thousand, five hundred fifty".