25475616 has 72 divisors (see below), whose sum is σ = 73857420. Its totient is φ = 8326656.

The previous prime is 25475587. The next prime is 25475617. The reversal of 25475616 is 61657452.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 25040016 + 435600 = 5004^2 + 660^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (25475617) 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, 14430 + ... + 16098.

Almost surely, 2^25475616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25475616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36928710).

25475616 is an abundant number, since it is smaller than the sum of its proper divisors (48381804).

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

25475616 is a wasteful number, since it uses less digits than its factorization.

25475616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1738 (or 1727 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 25475616 is about 5047.3375159583. The cubic root of 25475616 is about 294.2444170446.

The spelling of 25475616 in words is "twenty-five million, four hundred seventy-five thousand, six hundred sixteen".