11571057156 has 24 divisors (see below), whose sum is σ = 27379404864. Its totient is φ = 3802694560.

The previous prime is 11571057137. The next prime is 11571057181. The reversal of 11571057156 is 65175017511.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6789675 + ... + 6791378.

It is an arithmetic number, because the mean of its divisors is an integer number (1140808536).

Almost surely, 2^11571057156 is an apocalyptic number.

It is an amenable number.

11571057156 is an abundant number, since it is smaller than the sum of its proper divisors (15808347708).

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

11571057156 is a wasteful number, since it uses less digits than its factorization.

11571057156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13581131 (or 13581129 counting only the distinct ones).

The product of its (nonzero) digits is 36750, while the sum is 39.

The spelling of 11571057156 in words is "eleven billion, five hundred seventy-one million, fifty-seven thousand, one hundred fifty-six".