25725455844 has 96 divisors (see below), whose sum is σ = 66510968832. Its totient is φ = 7673568000.

The previous prime is 25725455843. The next prime is 25725455849. The reversal of 25725455844 is 44855452752.

It is not an unprimeable number, because it can be changed into a prime (25725455843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7130289 + ... + 7133895.

It is an arithmetic number, because the mean of its divisors is an integer number (692822592).

Almost surely, 2^25725455844 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 25725455844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33255484416).

25725455844 is an abundant number, since it is smaller than the sum of its proper divisors (40785512988).

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

25725455844 is a wasteful number, since it uses less digits than its factorization.

25725455844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4457 (or 4455 counting only the distinct ones).

The product of its digits is 8960000, while the sum is 51.

The spelling of 25725455844 in words is "twenty-five billion, seven hundred twenty-five million, four hundred fifty-five thousand, eight hundred forty-four".