25513663 has 12 divisors (see below), whose sum is σ = 30371880. Its totient is φ = 21358512.

The previous prime is 25513633. The next prime is 25513687. The reversal of 25513663 is 36631552.

It is not a de Polignac number, because 25513663 - 2²¹ = 23416511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25513613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3948 + ... + 8161.

It is an arithmetic number, because the mean of its divisors is an integer number (2530990).

Almost surely, 2^25513663 is an apocalyptic number.

25513663 is a deficient number, since it is larger than the sum of its proper divisors (4858217).

25513663 is a wasteful number, since it uses less digits than its factorization.

25513663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12166 (or 12159 counting only the distinct ones).

The product of its digits is 16200, while the sum is 31.

The square root of 25513663 is about 5051.1051266035. The cubic root of 25513663 is about 294.3908256571.

The spelling of 25513663 in words is "twenty-five million, five hundred thirteen thousand, six hundred sixty-three".