1156523560 has 32 divisors (see below), whose sum is σ = 2605271040. Its totient is φ = 462059584.

The previous prime is 1156523551. The next prime is 1156523561. The reversal of 1156523560 is 653256511.

It is not an unprimeable number, because it can be changed into a prime (1156523561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17769 + ... + 51271.

It is an arithmetic number, because the mean of its divisors is an integer number (81414720).

Almost surely, 2^1156523560 is an apocalyptic number.

1156523560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1156523560 is an abundant number, since it is smaller than the sum of its proper divisors (1448747480).

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

1156523560 is a wasteful number, since it uses less digits than its factorization.

1156523560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34377 (or 34373 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 1156523560 is about 34007.6985401835. The cubic root of 1156523560 is about 1049.6668814778. Note that the first 3 decimals are identical.

The spelling of 1156523560 in words is "one billion, one hundred fifty-six million, five hundred twenty-three thousand, five hundred sixty".