25565033748 has 72 divisors (see below), whose sum is σ = 64987749120. Its totient is φ = 7812702720.

The previous prime is 25565033677. The next prime is 25565033759. The reversal of 25565033748 is 84733056552.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 25565033697 and 25565033706.

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, 39108 + ... + 229476.

Almost surely, 2^25565033748 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 25565033748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32493874560).

25565033748 is an abundant number, since it is smaller than the sum of its proper divisors (39422715372).

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

25565033748 is a wasteful number, since it uses less digits than its factorization.

25565033748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190445 (or 190424 counting only the distinct ones).

The product of its (nonzero) digits is 3024000, while the sum is 48.

The spelling of 25565033748 in words is "twenty-five billion, five hundred sixty-five million, thirty-three thousand, seven hundred forty-eight".