72818874695231 has 32 divisors (see below), whose sum is σ = 85375840942080. Its totient is φ = 60812579126016.

The previous prime is 72818874695173. The next prime is 72818874695257. The reversal of 72818874695231 is 13259647881827.

It is a cyclic number.

It is not a de Polignac number, because 72818874695231 - 2²² = 72818870500927 is a prime.

It is a super-2 number, since 2×72818874695231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72818874694231) 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, 355356080 + ... + 355560938.

It is an arithmetic number, because the mean of its divisors is an integer number (2667995029440).

Almost surely, 2^{72818874695231} is an apocalyptic number.

72818874695231 is a deficient number, since it is larger than the sum of its proper divisors (12556966246849).

72818874695231 is a wasteful number, since it uses less digits than its factorization.

72818874695231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209783.

The product of its digits is 325140480, while the sum is 71.

The spelling of 72818874695231 in words is "seventy-two trillion, eight hundred eighteen billion, eight hundred seventy-four million, six hundred ninety-five thousand, two hundred thirty-one".