25645662 has 48 divisors (see below), whose sum is σ = 65231712. Its totient is φ = 7128000.

The previous prime is 25645651. The next prime is 25645663. The reversal of 25645662 is 26654652.

25645662 is a `hidden beast` number, since 2 + 5 + 645 + 6 + 6 + 2 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25645663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1912 + ... + 7412.

It is an arithmetic number, because the mean of its divisors is an integer number (1358994).

Almost surely, 2^25645662 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25645662, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32615856).

25645662 is an abundant number, since it is smaller than the sum of its proper divisors (39586050).

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

25645662 is a wasteful number, since it uses less digits than its factorization.

25645662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5553 (or 5550 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 25645662 is about 5064.1546184926. The cubic root of 25645662 is about 294.8976452336.

The spelling of 25645662 in words is "twenty-five million, six hundred forty-five thousand, six hundred sixty-two".