679956438650 has 12 divisors (see below), whose sum is σ = 1264718975982. Its totient is φ = 271982575440.

The previous prime is 679956438649. The next prime is 679956438713. The reversal of 679956438650 is 56834659976.

It can be written as a sum of positive squares in 3 ways, for example, as 546140214169 + 133816224481 = 739013^2 + 365809^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6799564337 + ... + 6799564436.

Almost surely, 2^679956438650 is an apocalyptic number.

679956438650 is a deficient number, since it is larger than the sum of its proper divisors (584762537332).

679956438650 is a wasteful number, since it uses less digits than its factorization.

679956438650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13599128785 (or 13599128780 counting only the distinct ones).

The product of its (nonzero) digits is 293932800, while the sum is 68.

The spelling of 679956438650 in words is "six hundred seventy-nine billion, nine hundred fifty-six million, four hundred thirty-eight thousand, six hundred fifty".