4521890025 has 27 divisors (see below), whose sum is σ = 8101014519. Its totient is φ = 2411136720.

The previous prime is 4521890003. The next prime is 4521890039. The reversal of 4521890025 is 5200981254.

The square root of 4521890025 is 67245.

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

4521890025 is a `hidden beast` number, since 452 + 189 + 0 + 0 + 25 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1627880409 + 2894009616 = 40347^2 + 53796^2 .

It is a de Polignac number, because none of the positive numbers 2^k-4521890025 is a prime.

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, 1006434 + ... + 1010916.

Almost surely, 2^4521890025 is an apocalyptic number.

4521890025 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

4521890025 is the 67245-th square number.

4521890025 is the 33623-rd centered octagonal number.

It is an amenable number.

4521890025 is a deficient number, since it is larger than the sum of its proper divisors (3579124494).

4521890025 is an frugal number, since it uses more digits than its factorization.

4521890025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8982 (or 4491 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The cubic root of 4521890025 is about 1653.6363054140.

Multiplying 4521890025 by its sum of digits (36), we get a square (162788040900 = 403470²).

The spelling of 4521890025 in words is "four billion, five hundred twenty-one million, eight hundred ninety thousand, twenty-five".