79909071976 has 16 divisors (see below), whose sum is σ = 153878956740. Its totient is φ = 38874683520.

The previous prime is 79909071961. The next prime is 79909072021. The reversal of 79909071976 is 67917090997.

It can be written as a sum of positive squares in 2 ways, for example, as 57039768900 + 22869303076 = 238830^2 + 151226^2 .

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 3 ways as a sum of consecutive naturals, for example, 134981245 + ... + 134981836.

Almost surely, 2^79909071976 is an apocalyptic number.

It is an amenable number.

79909071976 is a deficient number, since it is larger than the sum of its proper divisors (73969884764).

79909071976 is a wasteful number, since it uses less digits than its factorization.

79909071976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269963124 (or 269963120 counting only the distinct ones).

The product of its (nonzero) digits is 13502538, while the sum is 64.

The spelling of 79909071976 in words is "seventy-nine billion, nine hundred nine million, seventy-one thousand, nine hundred seventy-six".