72645620071075 has 12 divisors (see below), whose sum is σ = 90084396807720. Its totient is φ = 58114026431360.

The previous prime is 72645620071061. The next prime is 72645620071091. The reversal of 72645620071075 is 57017002654627.

It is not a de Polignac number, because 72645620071075 - 2⁵ = 72645620071043 is a prime.

It is a super-2 number, since 2×72645620071075² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61140445 + ... + 62317294.

It is an arithmetic number, because the mean of its divisors is an integer number (7507033067310).

Almost surely, 2^{72645620071075} is an apocalyptic number.

72645620071075 is a deficient number, since it is larger than the sum of its proper divisors (17438776736645).

72645620071075 is a wasteful number, since it uses less digits than its factorization.

72645620071075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123481286 (or 123481281 counting only the distinct ones).

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

The spelling of 72645620071075 in words is "seventy-two trillion, six hundred forty-five billion, six hundred twenty million, seventy-one thousand, seventy-five".