72645074307511 has 16 divisors (see below), whose sum is σ = 75831093565920. Its totient is φ = 69526753454080.

The previous prime is 72645074307437. The next prime is 72645074307527. The reversal of 72645074307511 is 11570347054627.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 72645074307511 - 2²⁵ = 72645040753079 is a prime.

It is a super-2 number, since 2×72645074307511² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72645074407511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14125575 + ... + 18569383.

It is an arithmetic number, because the mean of its divisors is an integer number (4739443347870).

Almost surely, 2^{72645074307511} is an apocalyptic number.

72645074307511 is a deficient number, since it is larger than the sum of its proper divisors (3186019258409).

72645074307511 is a wasteful number, since it uses less digits than its factorization.

72645074307511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4451426.

The product of its (nonzero) digits is 4939200, while the sum is 52.

The spelling of 72645074307511 in words is "seventy-two trillion, six hundred forty-five billion, seventy-four million, three hundred seven thousand, five hundred eleven".