3977747948512 has 48 divisors (see below), whose sum is σ = 8705641940352. Its totient is φ = 1776661608960.

The previous prime is 3977747948491. The next prime is 3977747948513. The reversal of 3977747948512 is 2158497477793.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3977747948513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154211203 + ... + 154236994.

It is an arithmetic number, because the mean of its divisors is an integer number (181367540424).

Almost surely, 2^{3977747948512} is an apocalyptic number.

3977747948512 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

3977747948512 is an abundant number, since it is smaller than the sum of its proper divisors (4727893991840).

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

3977747948512 is a wasteful number, since it uses less digits than its factorization.

3977747948512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308448251 (or 308448243 counting only the distinct ones).

The product of its digits is 746807040, while the sum is 73.

The spelling of 3977747948512 in words is "three trillion, nine hundred seventy-seven billion, seven hundred forty-seven million, nine hundred forty-eight thousand, five hundred twelve".