72400585531 has 2 divisors, whose sum is σ = 72400585532. Its totient is φ = 72400585530.

The previous prime is 72400585519. The next prime is 72400585553. The reversal of 72400585531 is 13558500427.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72400585531 - 2⁷ = 72400585403 is a prime.

It is a super-2 number, since 2×72400585531² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72400585511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36200292765 + 36200292766.

It is an arithmetic number, because the mean of its divisors is an integer number (36200292766).

Almost surely, 2^72400585531 is an apocalyptic number.

72400585531 is a deficient number, since it is larger than the sum of its proper divisors (1).

72400585531 is an equidigital number, since it uses as much as digits as its factorization.

72400585531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168000, while the sum is 40.

The spelling of 72400585531 in words is "seventy-two billion, four hundred million, five hundred eighty-five thousand, five hundred thirty-one".