79257018105 has 20 divisors (see below), whose sum is σ = 142075544292. Its totient is φ = 42270409440.

The previous prime is 79257018103. The next prime is 79257018109. The reversal of 79257018105 is 50181075297.

79257018105 is a `hidden beast` number, since 79 + 2 + 570 + 1 + 8 + 1 + 0 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 26384154624 + 52872863481 = 162432^2 + 229941^2 .

It is not a de Polignac number, because 79257018105 - 2¹ = 79257018103 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (79257018103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 97847766 + ... + 97848575.

Almost surely, 2^79257018105 is an apocalyptic number.

It is an amenable number.

79257018105 is a deficient number, since it is larger than the sum of its proper divisors (62818526187).

79257018105 is a wasteful number, since it uses less digits than its factorization.

79257018105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195696358 (or 195696349 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 45.

The spelling of 79257018105 in words is "seventy-nine billion, two hundred fifty-seven million, eighteen thousand, one hundred five".