79018390920 has 256 divisors, whose sum is σ = 291249561600. Its totient is φ = 16746531840.

The previous prime is 79018390909. The next prime is 79018390973. The reversal of 79018390920 is 2909381097.

It is a super-2 number, since 2×79018390920² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 79018390920.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 697450 + ... + 802790.

It is an arithmetic number, because the mean of its divisors is an integer number (1137693600).

Almost surely, 2^79018390920 is an apocalyptic number.

79018390920 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79018390920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145624780800).

79018390920 is an abundant number, since it is smaller than the sum of its proper divisors (212231170680).

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

79018390920 is a wasteful number, since it uses less digits than its factorization.

79018390920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105428 (or 105424 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 48.

The spelling of 79018390920 in words is "seventy-nine billion, eighteen million, three hundred ninety thousand, nine hundred twenty".