7977837548577 has 32 divisors (see below), whose sum is σ = 12135276703872. Its totient is φ = 4618333430784.

The previous prime is 7977837548489. The next prime is 7977837548581. The reversal of 7977837548577 is 7758457387797.

It is not a de Polignac number, because 7977837548577 - 2²⁸ = 7977569113121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7977837548577.

It is not an unprimeable number, because it can be changed into a prime (7977837548777) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1688743 + ... + 4336764.

It is an arithmetic number, because the mean of its divisors is an integer number (379227396996).

Almost surely, 2^{7977837548577} is an apocalyptic number.

It is an amenable number.

7977837548577 is a deficient number, since it is larger than the sum of its proper divisors (4157439155295).

7977837548577 is a wasteful number, since it uses less digits than its factorization.

7977837548577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6027537.

The product of its digits is 20329747200, while the sum is 84.

The spelling of 7977837548577 in words is "seven trillion, nine hundred seventy-seven billion, eight hundred thirty-seven million, five hundred forty-eight thousand, five hundred seventy-seven".