25025644544 has 48 divisors (see below), whose sum is σ = 50115134160. Its totient is φ = 12493803520.

The previous prime is 25025644531. The next prime is 25025644549. The reversal of 25025644544 is 44544652052.

It is not an unprimeable number, because it can be changed into a prime (25025644549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1389839 + ... + 1407729.

It is an arithmetic number, because the mean of its divisors is an integer number (1044065295).

Almost surely, 2^25025644544 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 25025644544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25057567080).

25025644544 is an abundant number, since it is smaller than the sum of its proper divisors (25089489616).

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

25025644544 is an equidigital number, since it uses as much as digits as its factorization.

25025644544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18596 (or 18576 counting only the distinct ones).

The product of its (nonzero) digits is 768000, while the sum is 41.

The spelling of 25025644544 in words is "twenty-five billion, twenty-five million, six hundred forty-four thousand, five hundred forty-four".