6879137744521 has 32 divisors (see below), whose sum is σ = 8073081218048. Its totient is φ = 5738974234560.

The previous prime is 6879137744509. The next prime is 6879137744533. The reversal of 6879137744521 is 1254477319786.

It is an interprime number because it is at equal distance from previous prime (6879137744509) and next prime (6879137744533).

It is not a de Polignac number, because 6879137744521 - 2⁵ = 6879137744489 is a prime.

It is a super-2 number, since 2×6879137744521² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6879137744321) 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, 455836186 + ... + 455851276.

It is an arithmetic number, because the mean of its divisors is an integer number (252283788064).

Almost surely, 2^{6879137744521} is an apocalyptic number.

It is an amenable number.

6879137744521 is a deficient number, since it is larger than the sum of its proper divisors (1193943473527).

6879137744521 is a wasteful number, since it uses less digits than its factorization.

6879137744521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20381.

The product of its digits is 71124480, while the sum is 64.

The spelling of 6879137744521 in words is "six trillion, eight hundred seventy-nine billion, one hundred thirty-seven million, seven hundred forty-four thousand, five hundred twenty-one".