79717787513 has 16 divisors (see below), whose sum is σ = 103278107520. Its totient is φ = 59753759616.

The previous prime is 79717787473. The next prime is 79717787579. The reversal of 79717787513 is 31578771797.

It is a cyclic number.

It is not a de Polignac number, because 79717787513 - 2⁸ = 79717787257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79717787593) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23051420 + ... + 23054877.

It is an arithmetic number, because the mean of its divisors is an integer number (6454881720).

Almost surely, 2^79717787513 is an apocalyptic number.

It is an amenable number.

79717787513 is a deficient number, since it is larger than the sum of its proper divisors (23560320007).

79717787513 is a wasteful number, since it uses less digits than its factorization.

79717787513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46106336.

The product of its digits is 18151560, while the sum is 62.

The spelling of 79717787513 in words is "seventy-nine billion, seven hundred seventeen million, seven hundred eighty-seven thousand, five hundred thirteen".