6918637672 has 16 divisors (see below), whose sum is σ = 13033929600. Its totient is φ = 3442923120.

The previous prime is 6918637669. The next prime is 6918637681. The reversal of 6918637672 is 2767368196.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2047672 + ... + 2051047.

It is an arithmetic number, because the mean of its divisors is an integer number (814620600).

Almost surely, 2^6918637672 is an apocalyptic number.

It is an amenable number.

6918637672 is a deficient number, since it is larger than the sum of its proper divisors (6115291928).

6918637672 is a wasteful number, since it uses less digits than its factorization.

6918637672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4098936 (or 4098932 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 55.

The square root of 6918637672 is about 83178.3485770185. The cubic root of 6918637672 is about 1905.4908269737.

The spelling of 6918637672 in words is "six billion, nine hundred eighteen million, six hundred thirty-seven thousand, six hundred seventy-two".