72785564944 has 15 divisors (see below), whose sum is σ = 141024122967. Its totient is φ = 36392242896.

The previous prime is 72785564941. The next prime is 72785564977. The reversal of 72785564944 is 44946558727.

The square root of 72785564944 is 269788.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72785564941) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1045429 + ... + 1112875.

Almost surely, 2^72785564944 is an apocalyptic number.

72785564944 is the 269788-th square number.

It is an amenable number.

72785564944 is a deficient number, since it is larger than the sum of its proper divisors (68238558023).

72785564944 is an frugal number, since it uses more digits than its factorization.

72785564944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134902 (or 67449 counting only the distinct ones).

The product of its digits is 67737600, while the sum is 61.

The spelling of 72785564944 in words is "seventy-two billion, seven hundred eighty-five million, five hundred sixty-four thousand, nine hundred forty-four".