72644487716 has 6 divisors (see below), whose sum is σ = 127127853510. Its totient is φ = 36322243856.

The previous prime is 72644487709. The next prime is 72644487719. The reversal of 72644487716 is 61778444627.

It can be written as a sum of positive squares in only one way, i.e., 53779465216 + 18865022500 = 231904^2 + 137350^2 .

It is not an unprimeable number, because it can be changed into a prime (72644487719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9080560961 + ... + 9080560968.

It is an arithmetic number, because the mean of its divisors is an integer number (21187975585).

Almost surely, 2^72644487716 is an apocalyptic number.

It is an amenable number.

72644487716 is a deficient number, since it is larger than the sum of its proper divisors (54483365794).

72644487716 is a wasteful number, since it uses less digits than its factorization.

72644487716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18161121933 (or 18161121931 counting only the distinct ones).

The product of its digits is 12644352, while the sum is 56.

The spelling of 72644487716 in words is "seventy-two billion, six hundred forty-four million, four hundred eighty-seven thousand, seven hundred sixteen".