11515297056 has 24 divisors (see below), whose sum is σ = 30227655024. Its totient is φ = 3838432320.

The previous prime is 11515297051. The next prime is 11515297063. The reversal of 11515297056 is 65079251511.

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

It is a junction number, because it is equal to n+sod(n) for n = 11515296999 and 11515297017.

It is not an unprimeable number, because it can be changed into a prime (11515297051) 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, 59975410 + ... + 59975601.

It is an arithmetic number, because the mean of its divisors is an integer number (1259485626).

Almost surely, 2^11515297056 is an apocalyptic number.

11515297056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11515297056 is an abundant number, since it is smaller than the sum of its proper divisors (18712357968).

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

11515297056 is a wasteful number, since it uses less digits than its factorization.

11515297056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119951024 (or 119951016 counting only the distinct ones).

The product of its (nonzero) digits is 94500, while the sum is 42.

The spelling of 11515297056 in words is "eleven billion, five hundred fifteen million, two hundred ninety-seven thousand, fifty-six".