549668025 has 45 divisors (see below), whose sum is σ = 1020133213. Its totient is φ = 292593600.

The previous prime is 549667991. The next prime is 549668051. The reversal of 549668025 is 520866945.

The square root of 549668025 is 23445.

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

549668025 is a `hidden beast` number, since 549 + 6 + 6 + 80 + 25 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 69006249 + 480661776 = 8307^2 + 21924^2 .

It is a tau number, because it is divible by the number of its divisors (45).

It is not a de Polignac number, because 549668025 - 2⁷ = 549667897 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 1054765 + ... + 1055285.

Almost surely, 2^549668025 is an apocalyptic number.

549668025 is the 23445-th square number.

549668025 is the 11723-rd centered octagonal number.

It is an amenable number.

549668025 is a deficient number, since it is larger than the sum of its proper divisors (470465188).

549668025 is an frugal number, since it uses more digits than its factorization.

549668025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064 (or 529 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The cubic root of 549668025 is about 819.1563924664.

Multiplying 549668025 by its product of nonzero digits (518400), we get a square (284947904160000 = 16880400²).

The spelling of 549668025 in words is "five hundred forty-nine million, six hundred sixty-eight thousand, twenty-five".