37639492081 has 9 divisors (see below), whose sum is σ = 39728673273. Its totient is φ = 35654974020.

The previous prime is 37639492067. The next prime is 37639492123. The reversal of 37639492081 is 18029493673.

The square root of 37639492081 is 194009.

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

37639492081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 37639492081 - 2⁹ = 37639491569 is a prime.

It is a super-2 number, since 2×37639492081² (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 (37639492181) 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, 3681066 + ... + 3691276.

Almost surely, 2^37639492081 is an apocalyptic number.

37639492081 is the 194009-th square number.

37639492081 is the 97005-th centered octagonal number.

It is an amenable number.

37639492081 is a deficient number, since it is larger than the sum of its proper divisors (2089181192).

37639492081 is an frugal number, since it uses more digits than its factorization.

37639492081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20460 (or 10230 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 52.

The spelling of 37639492081 in words is "thirty-seven billion, six hundred thirty-nine million, four hundred ninety-two thousand, eighty-one".