25663090 has 16 divisors (see below), whose sum is σ = 46652760. Its totient is φ = 10163200.

The previous prime is 25663073. The next prime is 25663093. The reversal of 25663090 is 9036652.

It can be written as a sum of positive squares in 4 ways, for example, as 21464689 + 4198401 = 4633^2 + 2049^2 .

It is not an unprimeable number, because it can be changed into a prime (25663093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11695 + ... + 13714.

Almost surely, 2^25663090 is an apocalyptic number.

25663090 is a deficient number, since it is larger than the sum of its proper divisors (20989670).

25663090 is a wasteful number, since it uses less digits than its factorization.

25663090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25517.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 25663090 is about 5065.8750478076. The cubic root of 25663090 is about 294.9644312186.

The spelling of 25663090 in words is "twenty-five million, six hundred sixty-three thousand, ninety".