79782688479 has 16 divisors (see below), whose sum is σ = 114608005344. Its totient is φ = 49076361600.

The previous prime is 79782688451. The next prime is 79782688529. The reversal of 79782688479 is 97488628797.

It is a de Polignac number, because none of the positive numbers 2^k-79782688479 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79782688479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79782688409) 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, 336732 + ... + 522449.

It is an arithmetic number, because the mean of its divisors is an integer number (7163000334).

Almost surely, 2^79782688479 is an apocalyptic number.

79782688479 is a deficient number, since it is larger than the sum of its proper divisors (34825316865).

79782688479 is a wasteful number, since it uses less digits than its factorization.

79782688479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861578.

The product of its digits is 682795008, while the sum is 75.

The spelling of 79782688479 in words is "seventy-nine billion, seven hundred eighty-two million, six hundred eighty-eight thousand, four hundred seventy-nine".