72316715620031 has 2 divisors, whose sum is σ = 72316715620032. Its totient is φ = 72316715620030.

The previous prime is 72316715620007. The next prime is 72316715620069. The reversal of 72316715620031 is 13002651761327.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72316715620031 is a prime.

It is a super-2 number, since 2×72316715620031² (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 (72316715629031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36158357810015 + 36158357810016.

It is an arithmetic number, because the mean of its divisors is an integer number (36158357810016).

Almost surely, 2^{72316715620031} is an apocalyptic number.

72316715620031 is a deficient number, since it is larger than the sum of its proper divisors (1).

72316715620031 is an equidigital number, since it uses as much as digits as its factorization.

72316715620031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317520, while the sum is 44.

The spelling of 72316715620031 in words is "seventy-two trillion, three hundred sixteen billion, seven hundred fifteen million, six hundred twenty thousand, thirty-one".