679121851356 has 36 divisors (see below), whose sum is σ = 1848720596632. Its totient is φ = 208960569504.

The previous prime is 679121851333. The next prime is 679121851363. The reversal of 679121851356 is 653158121976.

679121851356 is a `hidden beast` number, since 6 + 79 + 1 + 2 + 1 + 8 + 513 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×679121851356² (a number of 24 digits) 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 11 ways as a sum of consecutive naturals, for example, 725557066 + ... + 725558001.

Almost surely, 2^679121851356 is an apocalyptic number.

It is an amenable number.

679121851356 is an abundant number, since it is smaller than the sum of its proper divisors (1169598745276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

679121851356 is a wasteful number, since it uses less digits than its factorization.

679121851356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451115090 (or 1451115085 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 54.

The spelling of 679121851356 in words is "six hundred seventy-nine billion, one hundred twenty-one million, eight hundred fifty-one thousand, three hundred fifty-six".