72979792715 has 4 divisors (see below), whose sum is σ = 87575751264. Its totient is φ = 58383834168.

The previous prime is 72979792703. The next prime is 72979792727. The reversal of 72979792715 is 51729797927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51729797927 = 23 ⋅2249121649.

It is an interprime number because it is at equal distance from previous prime (72979792703) and next prime (72979792727).

It is a cyclic number.

It is not a de Polignac number, because 72979792715 - 2²⁸ = 72711357259 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7297979267 + ... + 7297979276.

It is an arithmetic number, because the mean of its divisors is an integer number (21893937816).

Almost surely, 2^72979792715 is an apocalyptic number.

72979792715 is a deficient number, since it is larger than the sum of its proper divisors (14595958549).

72979792715 is a wasteful number, since it uses less digits than its factorization.

72979792715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14595958548.

The product of its digits is 35006580, while the sum is 65.

The spelling of 72979792715 in words is "seventy-two billion, nine hundred seventy-nine million, seven hundred ninety-two thousand, seven hundred fifteen".