6979355638 has 16 divisors (see below), whose sum is σ = 10509108480. Its totient is φ = 3476333800.

The previous prime is 6979355623. The next prime is 6979355651. The reversal of 6979355638 is 8365539796.

It is a super-2 number, since 2×6979355638² = 97422810243364774088, which contains 22 as substring.

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, 1684173 + ... + 1688311.

It is an arithmetic number, because the mean of its divisors is an integer number (656819280).

Almost surely, 2^6979355638 is an apocalyptic number.

6979355638 is a deficient number, since it is larger than the sum of its proper divisors (3529752842).

6979355638 is a wasteful number, since it uses less digits than its factorization.

6979355638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7163.

The product of its digits is 36741600, while the sum is 61.

The square root of 6979355638 is about 83542.5378953740. The cubic root of 6979355638 is about 1911.0487956293.

The spelling of 6979355638 in words is "six billion, nine hundred seventy-nine million, three hundred fifty-five thousand, six hundred thirty-eight".