18451792758025 has 27 divisors (see below), whose sum is σ = 25149658061269. Its totient is φ = 13419313820000.

The previous prime is 18451792758013. The next prime is 18451792758059. The reversal of 18451792758025 is 52085729715481.

The square root of 18451792758025 is 4295555.

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 1105700619529 + 17346092138496 = 1051523^2 + 4164864^2 .

It is not a de Polignac number, because 18451792758025 - 2²⁵ = 18451759203593 is a prime.

It is a Duffinian number.

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, 236216475 + ... + 236294575.

Almost surely, 2^{18451792758025} is an apocalyptic number.

18451792758025 is the 4295555-th square number.

18451792758025 is the 2147778-th centered octagonal number.

It is an amenable number.

18451792758025 is a deficient number, since it is larger than the sum of its proper divisors (6697865303244).

18451792758025 is an frugal number, since it uses more digits than its factorization.

18451792758025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156234 (or 78117 counting only the distinct ones).

The product of its (nonzero) digits is 56448000, while the sum is 64.

The spelling of 18451792758025 in words is "eighteen trillion, four hundred fifty-one billion, seven hundred ninety-two million, seven hundred fifty-eight thousand, twenty-five".