25776081 has 12 divisors (see below), whose sum is σ = 37743108. Its totient is φ = 16948224.

The previous prime is 25776067. The next prime is 25776083. The reversal of 25776081 is 18067752.

25776081 is a `hidden beast` number, since 2 + 577 + 6 + 0 + 81 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6275025 + 19501056 = 2505^2 + 4416^2 .

It is not a de Polignac number, because 25776081 - 2⁶ = 25776017 is a prime.

It is a super-2 number, since 2×25776081² = 1328812703437122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25776083) 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 11 ways as a sum of consecutive naturals, for example, 18960 + ... + 20273.

It is an arithmetic number, because the mean of its divisors is an integer number (3145259).

Almost surely, 2^25776081 is an apocalyptic number.

It is an amenable number.

25776081 is a deficient number, since it is larger than the sum of its proper divisors (11967027).

25776081 is a wasteful number, since it uses less digits than its factorization.

25776081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39312 (or 39309 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 25776081 is about 5077.0149694481. The cubic root of 25776081 is about 295.3966931691.

The spelling of 25776081 in words is "twenty-five million, seven hundred seventy-six thousand, eighty-one".