25564956 has 48 divisors (see below), whose sum is σ = 64834560. Its totient is φ = 7810560.

The previous prime is 25564951. The next prime is 25564961. The reversal of 25564956 is 65946552.

It is an interprime number because it is at equal distance from previous prime (25564951) and next prime (25564961).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25564951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5260 + ... + 8876.

It is an arithmetic number, because the mean of its divisors is an integer number (1350720).

Almost surely, 2^25564956 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 25564956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32417280).

25564956 is an abundant number, since it is smaller than the sum of its proper divisors (39269604).

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

25564956 is a wasteful number, since it uses less digits than its factorization.

25564956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3674 (or 3672 counting only the distinct ones).

The product of its digits is 324000, while the sum is 42.

The square root of 25564956 is about 5056.1799809738. The cubic root of 25564956 is about 294.5879759800.

The spelling of 25564956 in words is "twenty-five million, five hundred sixty-four thousand, nine hundred fifty-six".