25645444152 has 96 divisors (see below), whose sum is σ = 66606497280. Its totient is φ = 8219871360.

The previous prime is 25645444091. The next prime is 25645444177. The reversal of 25645444152 is 25144454652.

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, 73482474 + ... + 73482822.

It is an arithmetic number, because the mean of its divisors is an integer number (693817680).

Almost surely, 2^25645444152 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 25645444152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33303248640).

25645444152 is an abundant number, since it is smaller than the sum of its proper divisors (40961053128).

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

25645444152 is a wasteful number, since it uses less digits than its factorization.

25645444152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021 (or 668 counting only the distinct ones).

The product of its digits is 768000, while the sum is 42.

The spelling of 25645444152 in words is "twenty-five billion, six hundred forty-five million, four hundred forty-four thousand, one hundred fifty-two".