1156565056 has 28 divisors (see below), whose sum is σ = 2324120320. Its totient is φ = 570960000.

The previous prime is 1156565041. The next prime is 1156565087. The reversal of 1156565056 is 6505656511.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109320 + ... + 119431.

Almost surely, 2^1156565056 is an apocalyptic number.

1156565056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1156565056 is an abundant number, since it is smaller than the sum of its proper divisors (1167555264).

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

1156565056 is an equidigital number, since it uses as much as digits as its factorization.

1156565056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228842 (or 228832 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 40.

The square root of 1156565056 is about 34008.3086318623. The cubic root of 1156565056 is about 1049.6794353238.

It can be divided in two parts, 115656505 and 6, that added together give a palindrome (115656511).

The spelling of 1156565056 in words is "one billion, one hundred fifty-six million, five hundred sixty-five thousand, fifty-six".