37272549721 has 9 divisors (see below), whose sum is σ = 40971335349. Its totient is φ = 33882205500.

The previous prime is 37272549707. The next prime is 37272549737. The reversal of 37272549721 is 12794527273.

It is a happy number.

The square root of 37272549721 is 193061.

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

It is not a de Polignac number, because 37272549721 - 2²⁵ = 37238995289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (37272549701) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2114896 + ... + 2132446.

Almost surely, 2^37272549721 is an apocalyptic number.

37272549721 is the 193061-st square number.

37272549721 is the 96531-st centered octagonal number.

It is an amenable number.

37272549721 is a deficient number, since it is larger than the sum of its proper divisors (3698785628).

37272549721 is an frugal number, since it uses more digits than its factorization.

37272549721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35124 (or 17562 counting only the distinct ones).

The product of its digits is 1481760, while the sum is 49.

Multiplying 37272549721 by its sum of digits (49), we get a square (1826354936329 = 1351427²).

The spelling of 37272549721 in words is "thirty-seven billion, two hundred seventy-two million, five hundred forty-nine thousand, seven hundred twenty-one".