115581568 has 16 divisors (see below), whose sum is σ = 230260410. Its totient is φ = 57790720.

The previous prime is 115581551. The next prime is 115581577. The reversal of 115581568 is 865185511.

It can be written as a sum of positive squares in only one way, i.e., 78712384 + 36869184 = 8872^2 + 6072^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×115581568² = 26718197722677248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 115581568.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 451363 + ... + 451618.

Almost surely, 2^115581568 is an apocalyptic number.

It is an amenable number.

115581568 is a deficient number, since it is larger than the sum of its proper divisors (114678842).

115581568 is an frugal number, since it uses more digits than its factorization.

115581568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902995 (or 902983 counting only the distinct ones).

The product of its digits is 48000, while the sum is 40.

The square root of 115581568 is about 10750.8868471396. The cubic root of 115581568 is about 487.1127837314.

The spelling of 115581568 in words is "one hundred fifteen million, five hundred eighty-one thousand, five hundred sixty-eight".