79819980975 has 36 divisors (see below), whose sum is σ = 163390237296. Its totient is φ = 36489133440.

The previous prime is 79819980953. The next prime is 79819980997. The reversal of 79819980975 is 57908991897.

It is an interprime number because it is at equal distance from previous prime (79819980953) and next prime (79819980997).

It is not a de Polignac number, because 79819980975 - 2⁸ = 79819980719 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 25338102 + ... + 25341251.

Almost surely, 2^79819980975 is an apocalyptic number.

79819980975 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

79819980975 is an abundant number, since it is smaller than the sum of its proper divisors (83570256321).

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

79819980975 is a wasteful number, since it uses less digits than its factorization.

79819980975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50679376 (or 50679368 counting only the distinct ones).

The product of its (nonzero) digits is 102876480, while the sum is 72.

The spelling of 79819980975 in words is "seventy-nine billion, eight hundred nineteen million, nine hundred eighty thousand, nine hundred seventy-five".