79617778695 has 96 divisors (see below), whose sum is σ = 178790976000. Its totient is φ = 31828660992.

The previous prime is 79617778649. The next prime is 79617778697. The reversal of 79617778695 is 59687771697.

It is not a de Polignac number, because 79617778695 - 2⁷ = 79617778567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79617778697) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 433845 + ... + 589454.

It is an arithmetic number, because the mean of its divisors is an integer number (1862406000).

Almost surely, 2^79617778695 is an apocalyptic number.

79617778695 is an abundant number, since it is smaller than the sum of its proper divisors (99173197305).

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

79617778695 is a wasteful number, since it uses less digits than its factorization.

79617778695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023349 (or 1023346 counting only the distinct ones).

The product of its digits is 280052640, while the sum is 72.

The spelling of 79617778695 in words is "seventy-nine billion, six hundred seventeen million, seven hundred seventy-eight thousand, six hundred ninety-five".