15111409056 has 24 divisors (see below), whose sum is σ = 39667449024. Its totient is φ = 5037136320.

The previous prime is 15111409051. The next prime is 15111409069. The reversal of 15111409056 is 65090411151.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×15111409056² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15111409051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78705160 + ... + 78705351.

It is an arithmetic number, because the mean of its divisors is an integer number (1652810376).

Almost surely, 2^15111409056 is an apocalyptic number.

15111409056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

15111409056 is an abundant number, since it is smaller than the sum of its proper divisors (24556039968).

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

15111409056 is a wasteful number, since it uses less digits than its factorization.

15111409056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157410524 (or 157410516 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 33.

The spelling of 15111409056 in words is "fifteen billion, one hundred eleven million, four hundred nine thousand, fifty-six".