12172772543672 has 64 divisors (see below), whose sum is σ = 25491261448800. Its totient is φ = 5410807395840.

The previous prime is 12172772543671. The next prime is 12172772543681. The reversal of 12172772543672 is 27634527727121.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12172772543671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3885854 + ... + 6280557.

Almost surely, 2^{12172772543672} is an apocalyptic number.

It is an amenable number.

12172772543672 is an abundant number, since it is smaller than the sum of its proper divisors (13318488905128).

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

12172772543672 is a wasteful number, since it uses less digits than its factorization.

12172772543672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10166856 (or 10166852 counting only the distinct ones).

The product of its digits is 13829760, while the sum is 56.

The spelling of 12172772543672 in words is "twelve trillion, one hundred seventy-two billion, seven hundred seventy-two million, five hundred forty-three thousand, six hundred seventy-two".