11626641972 has 72 divisors (see below), whose sum is σ = 33947327232. Its totient is φ = 3315974400.

The previous prime is 11626641941. The next prime is 11626642009. The reversal of 11626641972 is 27914662611.

11626641972 is a `hidden beast` number, since 1 + 1 + 626 + 6 + 4 + 19 + 7 + 2 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 856804 + ... + 870267.

It is an arithmetic number, because the mean of its divisors is an integer number (471490656).

Almost surely, 2^11626641972 is an apocalyptic number.

11626641972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11626641972 is an abundant number, since it is smaller than the sum of its proper divisors (22320685260).

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

11626641972 is a wasteful number, since it uses less digits than its factorization.

11626641972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1727109 (or 1727104 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The spelling of 11626641972 in words is "eleven billion, six hundred twenty-six million, six hundred forty-one thousand, nine hundred seventy-two".