18375158025 has 81 divisors (see below), whose sum is σ = 38315007783. Its totient is φ = 8393565600.

The previous prime is 18375158003. The next prime is 18375158047. The reversal of 18375158025 is 52085157381.

The square root of 18375158025 is 135555.

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

18375158025 is a `hidden beast` number, since 1 + 8 + 37 + 515 + 80 + 25 = 666.

It is an interprime number because it is at equal distance from previous prime (18375158003) and next prime (18375158047).

It can be written as a sum of positive squares in only one way, i.e., 6615056889 + 11760101136 = 81333^2 + 108444^2 .

It is not a de Polignac number, because 18375158025 - 2²⁷ = 18240940297 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 80 ways as a sum of consecutive naturals, for example, 14232630 + ... + 14233920.

Almost surely, 2^18375158025 is an apocalyptic number.

18375158025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18375158025 is the 135555-th square number.

18375158025 is the 67778-th centered octagonal number.

It is an amenable number.

18375158025 is an abundant number, since it is smaller than the sum of its proper divisors (19939849758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18375158025 is an equidigital number, since it uses as much as digits as its factorization.

18375158025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2612 (or 1306 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 45.

It can be divided in two parts, 18375 and 158025, that added together give a square (176400 = 420²).

The spelling of 18375158025 in words is "eighteen billion, three hundred seventy-five million, one hundred fifty-eight thousand, twenty-five".