72818874694231 has 2 divisors, whose sum is σ = 72818874694232. Its totient is φ = 72818874694230.

The previous prime is 72818874694123. The next prime is 72818874694297. The reversal of 72818874694231 is 13249647881827.

Together with previous prime (72818874694123) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72818874694231 - 2¹¹ = 72818874692183 is a prime.

It is a super-2 number, since 2×72818874694231² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72818814694231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36409437347115 + 36409437347116.

It is an arithmetic number, because the mean of its divisors is an integer number (36409437347116).

Almost surely, 2^{72818874694231} is an apocalyptic number.

72818874694231 is a deficient number, since it is larger than the sum of its proper divisors (1).

72818874694231 is an equidigital number, since it uses as much as digits as its factorization.

72818874694231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 260112384, while the sum is 70.

The spelling of 72818874694231 in words is "seventy-two trillion, eight hundred eighteen billion, eight hundred seventy-four million, six hundred ninety-four thousand, two hundred thirty-one".