25495864 has 8 divisors (see below), whose sum is σ = 47804760. Its totient is φ = 12747928.

The previous prime is 25495829. The next prime is 25495889. The reversal of 25495864 is 46859452.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×25495864² = 1300078162212992, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25495864.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1593484 + ... + 1593499.

It is an arithmetic number, because the mean of its divisors is an integer number (5975595).

Almost surely, 2^25495864 is an apocalyptic number.

It is an amenable number.

25495864 is a deficient number, since it is larger than the sum of its proper divisors (22308896).

25495864 is a wasteful number, since it uses less digits than its factorization.

25495864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3186989 (or 3186985 counting only the distinct ones).

The product of its digits is 345600, while the sum is 43.

The square root of 25495864 is about 5049.3429275501. The cubic root of 25495864 is about 294.3223514796.

The spelling of 25495864 in words is "twenty-five million, four hundred ninety-five thousand, eight hundred sixty-four".