12172064564 has 24 divisors (see below), whose sum is σ = 23987179776. Its totient is φ = 5354280000.

The previous prime is 12172064551. The next prime is 12172064573. The reversal of 12172064564 is 46546027121.

It is a happy number.

It is a congruent number.

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, 4460537 + ... + 4463264.

It is an arithmetic number, because the mean of its divisors is an integer number (999465824).

Almost surely, 2^12172064564 is an apocalyptic number.

It is an amenable number.

12172064564 is a deficient number, since it is larger than the sum of its proper divisors (11815115212).

12172064564 is a wasteful number, since it uses less digits than its factorization.

12172064564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8923847 (or 8923845 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 12172064564 in words is "twelve billion, one hundred seventy-two million, sixty-four thousand, five hundred sixty-four".