12977865974420 has 24 divisors (see below), whose sum is σ = 27700297541448. Its totient is φ = 5106045628800.

The previous prime is 12977865974407. The next prime is 12977865974471. The reversal of 12977865974420 is 2447956877921.

12977865974420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1776179914756 + 11201686059664 = 1332734^2 + 3346892^2 .

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, 5318796311 + ... + 5318798750.

It is an arithmetic number, because the mean of its divisors is an integer number (1154179064227).

Almost surely, 2^{12977865974420} is an apocalyptic number.

12977865974420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12977865974420 is an abundant number, since it is smaller than the sum of its proper divisors (14722431567028).

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

12977865974420 is a wasteful number, since it uses less digits than its factorization.

12977865974420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10637595131 (or 10637595129 counting only the distinct ones).

The product of its (nonzero) digits is 426746880, while the sum is 71.

The spelling of 12977865974420 in words is "twelve trillion, nine hundred seventy-seven billion, eight hundred sixty-five million, nine hundred seventy-four thousand, four hundred twenty".