79664384251 has 16 divisors (see below), whose sum is σ = 85391539200. Its totient is φ = 74099491200.

The previous prime is 79664384237. The next prime is 79664384269. The reversal of 79664384251 is 15248346697.

It is a cyclic number.

It is not a de Polignac number, because 79664384251 - 2³¹ = 77516900603 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79664384192 and 79664384201.

It is not an unprimeable number, because it can be changed into a prime (79664384351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202590 + ... + 447628.

It is an arithmetic number, because the mean of its divisors is an integer number (5336971200).

Almost surely, 2^79664384251 is an apocalyptic number.

79664384251 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

79664384251 is the 126226-th centered decagonal number.

79664384251 is a deficient number, since it is larger than the sum of its proper divisors (5727154949).

79664384251 is a wasteful number, since it uses less digits than its factorization.

79664384251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245370.

The product of its digits is 8709120, while the sum is 55.

The spelling of 79664384251 in words is "seventy-nine billion, six hundred sixty-four million, three hundred eighty-four thousand, two hundred fifty-one".