679798002645 has 54 divisors (see below), whose sum is σ = 1192568361894. Its totient is φ = 358225655040.

The previous prime is 679798002619. The next prime is 679798002661. The reversal of 679798002645 is 546200897976.

It can be written as a sum of positive squares in 9 ways, for example, as 377642204676 + 302155797969 = 614526^2 + 549687^2 .

It is not a de Polignac number, because 679798002645 - 2⁵ = 679798002613 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 492249855 + ... + 492251235.

Almost surely, 2^679798002645 is an apocalyptic number.

It is an amenable number.

679798002645 is a deficient number, since it is larger than the sum of its proper divisors (512770359249).

679798002645 is an frugal number, since it uses more digits than its factorization.

679798002645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2951 (or 1478 counting only the distinct ones).

The product of its (nonzero) digits is 45722880, while the sum is 63.

The spelling of 679798002645 in words is "six hundred seventy-nine billion, seven hundred ninety-eight million, two thousand, six hundred forty-five".