11515156556 has 24 divisors (see below), whose sum is σ = 20868849120. Its totient is φ = 5553055872.

The previous prime is 11515156547. The next prime is 11515156559. The reversal of 11515156556 is 65565151511.

11515156556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11515156556² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11515156559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55721 + ... + 161663.

It is an arithmetic number, because the mean of its divisors is an integer number (869535380).

Almost surely, 2^11515156556 is an apocalyptic number.

It is an amenable number.

11515156556 is a deficient number, since it is larger than the sum of its proper divisors (9353692564).

11515156556 is a wasteful number, since it uses less digits than its factorization.

11515156556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106913 (or 106911 counting only the distinct ones).

The product of its digits is 112500, while the sum is 41.

The spelling of 11515156556 in words is "eleven billion, five hundred fifteen million, one hundred fifty-six thousand, five hundred fifty-six".