25564964 has 6 divisors (see below), whose sum is σ = 44738694. Its totient is φ = 12782480.

The previous prime is 25564963. The next prime is 25564997. The reversal of 25564964 is 46946552.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15054400 + 10510564 = 3880^2 + 3242^2 .

It is not an unprimeable number, because it can be changed into a prime (25564961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3195617 + ... + 3195624.

It is an arithmetic number, because the mean of its divisors is an integer number (7456449).

Almost surely, 2^25564964 is an apocalyptic number.

It is an amenable number.

25564964 is a deficient number, since it is larger than the sum of its proper divisors (19173730).

25564964 is a wasteful number, since it uses less digits than its factorization.

25564964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6391245 (or 6391243 counting only the distinct ones).

The product of its digits is 259200, while the sum is 41.

The square root of 25564964 is about 5056.1807720848. The cubic root of 25564964 is about 294.5880067084.

The spelling of 25564964 in words is "twenty-five million, five hundred sixty-four thousand, nine hundred sixty-four".