25664976 has 60 divisors (see below), whose sum is σ = 73782852. Its totient is φ = 8322048.

The previous prime is 25664959. The next prime is 25664983. The reversal of 25664976 is 67946652.

It can be written as a sum of positive squares in 2 ways, for example, as 12531600 + 13133376 = 3540^2 + 3624^2 .

It is a congruent number.

It is an unprimeable number.

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, 2920 + ... + 7736.

Almost surely, 2^25664976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25664976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36891426).

25664976 is an abundant number, since it is smaller than the sum of its proper divisors (48117876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25664976 is a wasteful number, since it uses less digits than its factorization.

25664976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4868 (or 4859 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 25664976 is about 5066.0611918926. The cubic root of 25664976 is about 294.9716567617.

The spelling of 25664976 in words is "twenty-five million, six hundred sixty-four thousand, nine hundred seventy-six".