79869556380 has 24 divisors (see below), whose sum is σ = 223634758032. Its totient is φ = 21298548352.

The previous prime is 79869556363. The next prime is 79869556391. The reversal of 79869556380 is 8365596897.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 665579577 + ... + 665579696.

It is an arithmetic number, because the mean of its divisors is an integer number (9318114918).

Almost surely, 2^79869556380 is an apocalyptic number.

It is an amenable number.

79869556380 is an abundant number, since it is smaller than the sum of its proper divisors (143765201652).

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

79869556380 is a wasteful number, since it uses less digits than its factorization.

79869556380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331159285 (or 1331159283 counting only the distinct ones).

The product of its (nonzero) digits is 97977600, while the sum is 66.

The spelling of 79869556380 in words is "seventy-nine billion, eight hundred sixty-nine million, five hundred fifty-six thousand, three hundred eighty".