37620869521 has 9 divisors (see below), whose sum is σ = 38157644721. Its totient is φ = 37091549952.

The previous prime is 37620869501. The next prime is 37620869569. The reversal of 37620869521 is 12596802673.

The square root of 37620869521 is 193961.

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

It can be written as a sum of positive squares in 4 ways, for example, as 1824229521 + 35796640000 = 42711^2 + 189200^2 .

It is not a de Polignac number, because 37620869521 - 2²⁵ = 37587315089 is a prime.

It is a super-2 number, since 2×37620869521² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (37620869501) 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, 14157825 + ... + 14160481.

Almost surely, 2^37620869521 is an apocalyptic number.

37620869521 is the 193961-st square number.

37620869521 is the 96981-st centered octagonal number.

It is an amenable number.

37620869521 is a deficient number, since it is larger than the sum of its proper divisors (536775200).

37620869521 is an frugal number, since it uses more digits than its factorization.

37620869521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5460 (or 2730 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 49.

Multiplying 37620869521 by its sum of digits (49), we get a square (1843422606529 = 1357727²).

The spelling of 37620869521 in words is "thirty-seven billion, six hundred twenty million, eight hundred sixty-nine thousand, five hundred twenty-one".