72715065131 has 4 divisors (see below), whose sum is σ = 75222481200. Its totient is φ = 70207649064.

The previous prime is 72715065121. The next prime is 72715065139. The reversal of 72715065131 is 13156051727.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 72715065131 - 2²⁶ = 72647956267 is a prime.

It is a super-2 number, since 2×72715065131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72715065139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1253707991 + ... + 1253708048.

It is an arithmetic number, because the mean of its divisors is an integer number (18805620300).

Almost surely, 2^72715065131 is an apocalyptic number.

72715065131 is a deficient number, since it is larger than the sum of its proper divisors (2507416069).

72715065131 is a wasteful number, since it uses less digits than its factorization.

72715065131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2507416068.

The product of its (nonzero) digits is 44100, while the sum is 38.

The spelling of 72715065131 in words is "seventy-two billion, seven hundred fifteen million, sixty-five thousand, one hundred thirty-one".