18380580625 has 135 divisors (see below), whose sum is σ = 27775328581. Its totient is φ = 12147520000.

The previous prime is 18380580623. The next prime is 18380580629. The reversal of 18380580625 is 52608508381.

The square root of 18380580625 is 135575.

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

It can be written as a sum of positive squares in 22 ways, for example, as 18356727169 + 23853456 = 135487^2 + 4884^2 .

It is not a de Polignac number, because 18380580625 - 2¹ = 18380580623 is a prime.

It is a super-2 number, since 2×18380580625² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18380580623) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 633813111 + ... + 633813139.

Almost surely, 2^18380580625 is an apocalyptic number.

18380580625 is the 135575-th square number.

18380580625 is the 67788-th centered octagonal number.

It is an amenable number.

18380580625 is a deficient number, since it is larger than the sum of its proper divisors (9394747956).

18380580625 is an equidigital number, since it uses as much as digits as its factorization.

18380580625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 62 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 46.

The spelling of 18380580625 in words is "eighteen billion, three hundred eighty million, five hundred eighty thousand, six hundred twenty-five".