1149313536 has 400 divisors, whose sum is σ = 4064043456. Its totient is φ = 316514304.

The previous prime is 1149313531. The next prime is 1149313547. The reversal of 1149313536 is 6353139411.

It is a happy number.

1149313536 is a `hidden beast` number, since 1 + 1 + 493 + 135 + 36 = 666.

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 1149313536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1149313531) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 10741195 + ... + 10741301.

Almost surely, 2^1149313536 is an apocalyptic number.

1149313536 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 1149313536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2032021728).

1149313536 is an abundant number, since it is smaller than the sum of its proper divisors (2914729920).

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

1149313536 is an equidigital number, since it uses as much as digits as its factorization.

1149313536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181 (or 156 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 1149313536 is about 33901.5270452527. The cubic root of 1149313536 is about 1047.4810475740.

The spelling of 1149313536 in words is "one billion, one hundred forty-nine million, three hundred thirteen thousand, five hundred thirty-six".