679971796540 has 24 divisors (see below), whose sum is σ = 1427958282240. Its totient is φ = 271985383488.

The previous prime is 679971796523. The next prime is 679971796571. The reversal of 679971796540 is 45697179976.

It is a super-3 number, since 3×679971796540³ (a number of 36 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 679971796540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2071749 + ... + 2377411.

It is an arithmetic number, because the mean of its divisors is an integer number (59498261760).

Almost surely, 2^679971796540 is an apocalyptic number.

It is an amenable number.

679971796540 is an abundant number, since it is smaller than the sum of its proper divisors (747986485700).

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

679971796540 is a wasteful number, since it uses less digits than its factorization.

679971796540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416901 (or 416899 counting only the distinct ones).

The product of its (nonzero) digits is 180033840, while the sum is 70.

The spelling of 679971796540 in words is "six hundred seventy-nine billion, nine hundred seventy-one million, seven hundred ninety-six thousand, five hundred forty".