78728759599 has 16 divisors (see below), whose sum is σ = 91257753600. Its totient is φ = 66520581120.

The previous prime is 78728759587. The next prime is 78728759633. The reversal of 78728759599 is 99595782787.

It is not a de Polignac number, because 78728759599 - 2²¹ = 78726662447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78728759509) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5160687 + ... + 5175919.

It is an arithmetic number, because the mean of its divisors is an integer number (5703609600).

Almost surely, 2^78728759599 is an apocalyptic number.

78728759599 is a deficient number, since it is larger than the sum of its proper divisors (12528994001).

78728759599 is a wasteful number, since it uses less digits than its factorization.

78728759599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25710.

The product of its digits is 800150400, while the sum is 76.

The spelling of 78728759599 in words is "seventy-eight billion, seven hundred twenty-eight million, seven hundred fifty-nine thousand, five hundred ninety-nine".