72707064244 has 12 divisors (see below), whose sum is σ = 134721913284. Its totient is φ = 34215089024.

The previous prime is 72707064233. The next prime is 72707064293. The reversal of 72707064244 is 44246070727.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 67091360400 + 5615703844 = 259020^2 + 74938^2 .

It is a super-2 number, since 2×72707064244² (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 72707064244.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 534610699 + ... + 534610834.

It is an arithmetic number, because the mean of its divisors is an integer number (11226826107).

Almost surely, 2^72707064244 is an apocalyptic number.

It is an amenable number.

72707064244 is a deficient number, since it is larger than the sum of its proper divisors (62014849040).

72707064244 is a wasteful number, since it uses less digits than its factorization.

72707064244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069221554 (or 1069221552 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 43.

The spelling of 72707064244 in words is "seventy-two billion, seven hundred seven million, sixty-four thousand, two hundred forty-four".