72706676531 has 2 divisors, whose sum is σ = 72706676532. Its totient is φ = 72706676530.

The previous prime is 72706676513. The next prime is 72706676557. The reversal of 72706676531 is 13567660727.

Together with previous prime (72706676513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72706676531 - 2³⁰ = 71632934707 is a prime.

It is a super-2 number, since 2×72706676531² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72706676531.

It is not a weakly prime, because it can be changed into another prime (72706673531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36353338265 + 36353338266.

It is an arithmetic number, because the mean of its divisors is an integer number (36353338266).

Almost surely, 2^72706676531 is an apocalyptic number.

72706676531 is a deficient number, since it is larger than the sum of its proper divisors (1).

72706676531 is an equidigital number, since it uses as much as digits as its factorization.

72706676531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2222640, while the sum is 50.

The spelling of 72706676531 in words is "seventy-two billion, seven hundred six million, six hundred seventy-six thousand, five hundred thirty-one".