12572546778 has 48 divisors (see below), whose sum is σ = 29772112032. Its totient is φ = 3802788000.

The previous prime is 12572546771. The next prime is 12572546797. The reversal of 12572546778 is 87764527521.

12572546778 is a `hidden beast` number, since 1 + 2 + 572 + 5 + 4 + 67 + 7 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (12572546771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48433 + ... + 165803.

It is an arithmetic number, because the mean of its divisors is an integer number (620252334).

Almost surely, 2^12572546778 is an apocalyptic number.

12572546778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12572546778 is an abundant number, since it is smaller than the sum of its proper divisors (17199565254).

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

12572546778 is a wasteful number, since it uses less digits than its factorization.

12572546778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117931 (or 117928 counting only the distinct ones).

The product of its digits is 6585600, while the sum is 54.

The spelling of 12572546778 in words is "twelve billion, five hundred seventy-two million, five hundred forty-six thousand, seven hundred seventy-eight".