25915645 has 16 divisors (see below), whose sum is σ = 35664768. Its totient is φ = 17709120.

The previous prime is 25915621. The next prime is 25915663. The reversal of 25915645 is 54651952.

It is not a de Polignac number, because 25915645 - 2⁵ = 25915613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10467 + ... + 12703.

It is an arithmetic number, because the mean of its divisors is an integer number (2229048).

Almost surely, 2^25915645 is an apocalyptic number.

It is an amenable number.

25915645 is a deficient number, since it is larger than the sum of its proper divisors (9749123).

25915645 is a wasteful number, since it uses less digits than its factorization.

25915645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2580.

The product of its digits is 54000, while the sum is 37.

The square root of 25915645 is about 5090.7411051830. The cubic root of 25915645 is about 295.9288733716.

The spelling of 25915645 in words is "twenty-five million, nine hundred fifteen thousand, six hundred forty-five".