11977407972 has 36 divisors (see below), whose sum is σ = 31320236220. Its totient is φ = 3854797632.

The previous prime is 11977407901. The next prime is 11977407983. The reversal of 11977407972 is 27970477911.

It can be written as a sum of positive squares in 2 ways, for example, as 3748378176 + 8229029796 = 61224^2 + 90714^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5735263 + ... + 5737350.

Almost surely, 2^11977407972 is an apocalyptic number.

11977407972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11977407972 is an abundant number, since it is smaller than the sum of its proper divisors (19342828248).

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

11977407972 is a wasteful number, since it uses less digits than its factorization.

11977407972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11472652 (or 11472647 counting only the distinct ones).

The product of its (nonzero) digits is 1555848, while the sum is 54.

The spelling of 11977407972 in words is "eleven billion, nine hundred seventy-seven million, four hundred seven thousand, nine hundred seventy-two".