72565406044667 has 6 divisors (see below), whose sum is σ = 74142200745948. Its totient is φ = 71021461233044.

The previous prime is 72565406044633. The next prime is 72565406044693. The reversal of 72565406044667 is 76644060456527.

It is not a de Polignac number, because 72565406044667 - 2⁶ = 72565406044603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72565406044697) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16424942573 + ... + 16424946990.

It is an arithmetic number, because the mean of its divisors is an integer number (12357033457658).

Almost surely, 2^{72565406044667} is an apocalyptic number.

72565406044667 is a deficient number, since it is larger than the sum of its proper divisors (1576794701281).

72565406044667 is an equidigital number, since it uses as much as digits as its factorization.

72565406044667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32849889657 (or 32849889610 counting only the distinct ones).

The product of its (nonzero) digits is 203212800, while the sum is 62.

The spelling of 72565406044667 in words is "seventy-two trillion, five hundred sixty-five billion, four hundred six million, forty-four thousand, six hundred sixty-seven".