37902249225 has 27 divisors (see below), whose sum is σ = 67892370663. Its totient is φ = 20212975440.

The previous prime is 37902249197. The next prime is 37902249239. The reversal of 37902249225 is 52294220973.

The square root of 37902249225 is 194685.

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

37902249225 is a `hidden beast` number, since 37 + 90 + 22 + 492 + 25 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13644809721 + 24257439504 = 116811^2 + 155748^2 .

It is not a de Polignac number, because 37902249225 - 2⁵ = 37902249193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2913786 + ... + 2926764.

Almost surely, 2^37902249225 is an apocalyptic number.

37902249225 is the 194685-th square number.

37902249225 is the 97343-rd centered octagonal number.

It is an amenable number.

37902249225 is a deficient number, since it is larger than the sum of its proper divisors (29990121438).

37902249225 is an frugal number, since it uses more digits than its factorization.

37902249225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25974 (or 12987 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The spelling of 37902249225 in words is "thirty-seven billion, nine hundred two million, two hundred forty-nine thousand, two hundred twenty-five".