79816087593 has 48 divisors (see below), whose sum is σ = 131113861632. Its totient is φ = 46349280000.

The previous prime is 79816087591. The next prime is 79816087613. The reversal of 79816087593 is 39578061897.

It is not a de Polignac number, because 79816087593 - 2¹ = 79816087591 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79816087593.

It is not an unprimeable number, because it can be changed into a prime (79816087591) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 181221 + ... + 438717.

It is an arithmetic number, because the mean of its divisors is an integer number (2731538784).

Almost surely, 2^79816087593 is an apocalyptic number.

It is an amenable number.

79816087593 is a deficient number, since it is larger than the sum of its proper divisors (51297774039).

79816087593 is a wasteful number, since it uses less digits than its factorization.

79816087593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257646 (or 257643 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 63.

The spelling of 79816087593 in words is "seventy-nine billion, eight hundred sixteen million, eighty-seven thousand, five hundred ninety-three".