1157523660 has 36 divisors (see below), whose sum is σ = 3511155648. Its totient is φ = 308672928.

The previous prime is 1157523649. The next prime is 1157523667. The reversal of 1157523660 is 663257511.

1157523660 is a `hidden beast` number, since 1 + 1 + 575 + 23 + 6 + 60 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1157523660² = 2679722046919591200, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (1157523667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3215164 + ... + 3215523.

Almost surely, 2^1157523660 is an apocalyptic number.

1157523660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1157523660 is an abundant number, since it is smaller than the sum of its proper divisors (2353631988).

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

1157523660 is a wasteful number, since it uses less digits than its factorization.

1157523660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6430702 (or 6430697 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 1157523660 is about 34022.3993862867. The cubic root of 1157523660 is about 1049.9693596501.

The spelling of 1157523660 in words is "one billion, one hundred fifty-seven million, five hundred twenty-three thousand, six hundred sixty".