25961550 has 48 divisors (see below), whose sum is σ = 68178672. Its totient is φ = 6515200.

The previous prime is 25961521. The next prime is 25961563. The reversal of 25961550 is 5516952.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2541 + ... + 7640.

It is an arithmetic number, because the mean of its divisors is an integer number (1420389).

Almost surely, 2^25961550 is an apocalyptic number.

25961550 is an abundant number, since it is smaller than the sum of its proper divisors (42217122).

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

25961550 is a wasteful number, since it uses less digits than its factorization.

25961550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10213 (or 10208 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 33.

The square root of 25961550 is about 5095.2477859276. The cubic root of 25961550 is about 296.1034989295.

The spelling of 25961550 in words is "twenty-five million, nine hundred sixty-one thousand, five hundred fifty".