79216564623749 has 32 divisors (see below), whose sum is σ = 96709784371200. Its totient is φ = 63421693513920.

The previous prime is 79216564623739. The next prime is 79216564623751. The reversal of 79216564623749 is 94732646561297.

It is a de Polignac number, because none of the positive numbers 2^k-79216564623749 is a prime.

It is a super-2 number, since 2×79216564623749² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79216564623739) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15931364 + ... + 20303730.

It is an arithmetic number, because the mean of its divisors is an integer number (3022180761600).

Almost surely, 2^{79216564623749} is an apocalyptic number.

It is an amenable number.

79216564623749 is a deficient number, since it is larger than the sum of its proper divisors (17493219747451).

79216564623749 is a wasteful number, since it uses less digits than its factorization.

79216564623749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4375313.

The product of its digits is 823011840, while the sum is 71.

The spelling of 79216564623749 in words is "seventy-nine trillion, two hundred sixteen billion, five hundred sixty-four million, six hundred twenty-three thousand, seven hundred forty-nine".