79735579640 has 16 divisors (see below), whose sum is σ = 179405054280. Its totient is φ = 31894231840.

The previous prime is 79735579639. The next prime is 79735579661. The reversal of 79735579640 is 4697553797.

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 3 ways as a sum of consecutive naturals, for example, 996694706 + ... + 996694785.

Almost surely, 2^79735579640 is an apocalyptic number.

It is an amenable number.

79735579640 is an abundant number, since it is smaller than the sum of its proper divisors (99669474640).

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

79735579640 is a wasteful number, since it uses less digits than its factorization.

79735579640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1993389502 (or 1993389498 counting only the distinct ones).

The product of its (nonzero) digits is 50009400, while the sum is 62.

The spelling of 79735579640 in words is "seventy-nine billion, seven hundred thirty-five million, five hundred seventy-nine thousand, six hundred forty".