45281712025 has 81 divisors (see below), whose sum is σ = 63777817047. Its totient is φ = 31868179200.

The previous prime is 45281712017. The next prime is 45281712037. The reversal of 45281712025 is 52021718254.

It is a happy number.

The square root of 45281712025 is 212795.

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

It can be written as a sum of positive squares in 13 ways, for example, as 15744477529 + 29537234496 = 125477^2 + 171864^2 .

It is not a de Polignac number, because 45281712025 - 2³ = 45281712017 is a prime.

It is a Duffinian number.

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, 620297389 + ... + 620297461.

Almost surely, 2^45281712025 is an apocalyptic number.

45281712025 is the 212795-th square number.

45281712025 is the 106398-th centered octagonal number.

It is an amenable number.

45281712025 is a deficient number, since it is larger than the sum of its proper divisors (18496105022).

45281712025 is an equidigital number, since it uses as much as digits as its factorization.

45281712025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 37.

The spelling of 45281712025 in words is "forty-five billion, two hundred eighty-one million, seven hundred twelve thousand, twenty-five".