72737325544 has 48 divisors (see below), whose sum is σ = 147728817900. Its totient is φ = 33560077824.

The previous prime is 72737325539. The next prime is 72737325559. The reversal of 72737325544 is 44552373727.

It can be written as a sum of positive squares in 6 ways, for example, as 21225576100 + 51511749444 = 145690^2 + 226962^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5305162 + ... + 5318854.

Almost surely, 2^72737325544 is an apocalyptic number.

It is an amenable number.

72737325544 is an abundant number, since it is smaller than the sum of its proper divisors (74991492356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72737325544 is a wasteful number, since it uses less digits than its factorization.

72737325544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17654 (or 17637 counting only the distinct ones).

The product of its digits is 4939200, while the sum is 49.

The spelling of 72737325544 in words is "seventy-two billion, seven hundred thirty-seven million, three hundred twenty-five thousand, five hundred forty-four".