11572722656 has 72 divisors (see below), whose sum is σ = 25720513560. Its totient is φ = 5118094080.

The previous prime is 11572722653. The next prime is 11572722677. The reversal of 11572722656 is 65622727511.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11572722653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102875 + ... + 183653.

It is an arithmetic number, because the mean of its divisors is an integer number (357229355).

Almost surely, 2^11572722656 is an apocalyptic number.

11572722656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11572722656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12860256780).

11572722656 is an abundant number, since it is smaller than the sum of its proper divisors (14147790904).

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

11572722656 is a wasteful number, since it uses less digits than its factorization.

11572722656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80848 (or 80829 counting only the distinct ones).

The product of its digits is 352800, while the sum is 44.

The spelling of 11572722656 in words is "eleven billion, five hundred seventy-two million, seven hundred twenty-two thousand, six hundred fifty-six".