25661950 has 12 divisors (see below), whose sum is σ = 47731320. Its totient is φ = 10264760.

The previous prime is 25661947. The next prime is 25661957. The reversal of 25661950 is 5916652.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25661957) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 256570 + ... + 256669.

It is an arithmetic number, because the mean of its divisors is an integer number (3977610).

Almost surely, 2^25661950 is an apocalyptic number.

25661950 is a deficient number, since it is larger than the sum of its proper divisors (22069370).

25661950 is a wasteful number, since it uses less digits than its factorization.

25661950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513251 (or 513246 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 25661950 is about 5065.7625289782. The cubic root of 25661950 is about 294.9600635394.

The spelling of 25661950 in words is "twenty-five million, six hundred sixty-one thousand, nine hundred fifty".