679638700555 has 4 divisors (see below), whose sum is σ = 815566440672. Its totient is φ = 543710960440.

The previous prime is 679638700541. The next prime is 679638700561. The reversal of 679638700555 is 555007836976.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 679638700555 - 2⁵ = 679638700523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 679638700493 and 679638700502.

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, 67963870051 + ... + 67963870060.

It is an arithmetic number, because the mean of its divisors is an integer number (203891610168).

Almost surely, 2^679638700555 is an apocalyptic number.

679638700555 is a deficient number, since it is larger than the sum of its proper divisors (135927740117).

679638700555 is a wasteful number, since it uses less digits than its factorization.

679638700555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135927740116.

The product of its (nonzero) digits is 47628000, while the sum is 61.

The spelling of 679638700555 in words is "six hundred seventy-nine billion, six hundred thirty-eight million, seven hundred thousand, five hundred fifty-five".