25664612 has 6 divisors (see below), whose sum is σ = 44913078. Its totient is φ = 12832304.

The previous prime is 25664599. The next prime is 25664629. The reversal of 25664612 is 21646652.

It can be written as a sum of positive squares in only one way, i.e., 25664356 + 256 = 5066^2 + 16^2 .

It is a super-2 number, since 2×25664612² = 1317344618221088, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3208073 + ... + 3208080.

It is an arithmetic number, because the mean of its divisors is an integer number (7485513).

Almost surely, 2^25664612 is an apocalyptic number.

It is an amenable number.

25664612 is a deficient number, since it is larger than the sum of its proper divisors (19248466).

25664612 is a wasteful number, since it uses less digits than its factorization.

25664612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6416157 (or 6416155 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 25664612 is about 5066.0252664194. The cubic root of 25664612 is about 294.9702622518.

The spelling of 25664612 in words is "twenty-five million, six hundred sixty-four thousand, six hundred twelve".