79714257921 has 20 divisors (see below), whose sum is σ = 125346658800. Its totient is φ = 50345846136.

The previous prime is 79714257919. The next prime is 79714257929. The reversal of 79714257921 is 12975241797.

79714257921 is a `hidden beast` number, since 7 + 9 + 7 + 1 + 42 + 579 + 21 = 666.

It is not a de Polignac number, because 79714257921 - 2¹ = 79714257919 is a prime.

It is a super-2 number, since 2×79714257921² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (79714257929) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 25896531 + ... + 25899608.

It is an arithmetic number, because the mean of its divisors is an integer number (6267332940).

Almost surely, 2^79714257921 is an apocalyptic number.

It is an amenable number.

79714257921 is a deficient number, since it is larger than the sum of its proper divisors (45632400879).

79714257921 is a wasteful number, since it uses less digits than its factorization.

79714257921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51796170 (or 51796161 counting only the distinct ones).

The product of its digits is 2222640, while the sum is 54.

The spelling of 79714257921 in words is "seventy-nine billion, seven hundred fourteen million, two hundred fifty-seven thousand, nine hundred twenty-one".