79751992840 has 32 divisors (see below), whose sum is σ = 193245214680. Its totient is φ = 29446889472.

The previous prime is 79751992813. The next prime is 79751992841. The reversal of 79751992840 is 4829915797.

It can be written as a sum of positive squares in 4 ways, for example, as 65232224836 + 14519768004 = 255406^2 + 120498^2 .

It is a super-2 number, since 2×79751992840² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79751992841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76684089 + ... + 76685128.

Almost surely, 2^79751992840 is an apocalyptic number.

It is an amenable number.

79751992840 is an abundant number, since it is smaller than the sum of its proper divisors (113493221840).

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

79751992840 is a wasteful number, since it uses less digits than its factorization.

79751992840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153369241 (or 153369237 counting only the distinct ones).

The product of its (nonzero) digits is 11430720, while the sum is 61.

The spelling of 79751992840 in words is "seventy-nine billion, seven hundred fifty-one million, nine hundred ninety-two thousand, eight hundred forty".