79109788831 has 2 divisors, whose sum is σ = 79109788832. Its totient is φ = 79109788830.

The previous prime is 79109788781. The next prime is 79109788853. The reversal of 79109788831 is 13888790197.

It is a strong prime.

It is an emirp because it is prime and its reverse (13888790197) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79109788831 - 2²³ = 79101400223 is a prime.

It is a super-2 number, since 2×79109788831² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 79109788831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79109788871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39554894415 + 39554894416.

It is an arithmetic number, because the mean of its divisors is an integer number (39554894416).

Almost surely, 2^79109788831 is an apocalyptic number.

79109788831 is a deficient number, since it is larger than the sum of its proper divisors (1).

79109788831 is an equidigital number, since it uses as much as digits as its factorization.

79109788831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6096384, while the sum is 61.

The spelling of 79109788831 in words is "seventy-nine billion, one hundred nine million, seven hundred eighty-eight thousand, eight hundred thirty-one".