11972640560 has 40 divisors (see below), whose sum is σ = 28588731216. Its totient is φ = 4659621120.

The previous prime is 11972640527. The next prime is 11972640571. The reversal of 11972640560 is 6504627911.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×11972640560² (a number of 21 digits) contains 22 as substring.

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, 2019446 + ... + 2025365.

Almost surely, 2^11972640560 is an apocalyptic number.

11972640560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11972640560 is an abundant number, since it is smaller than the sum of its proper divisors (16616090656).

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

11972640560 is a wasteful number, since it uses less digits than its factorization.

11972640560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4044861 (or 4044855 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 11972640560 in words is "eleven billion, nine hundred seventy-two million, six hundred forty thousand, five hundred sixty".