25951887488 has 72 divisors (see below), whose sum is σ = 53654571165. Its totient is φ = 12502981120.

The previous prime is 25951887487. The next prime is 25951887497. The reversal of 25951887488 is 88478815952.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 25936458304 + 15429184 = 161048^2 + 3928^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=113912.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25951887487) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 52854923 + ... + 52855413.

Almost surely, 2^25951887488 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 25951887488

25951887488 is an abundant number, since it is smaller than the sum of its proper divisors (27702683677).

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

25951887488 is an frugal number, since it uses more digits than its factorization.

25951887488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054 (or 522 counting only the distinct ones).

The product of its digits is 51609600, while the sum is 65.

The spelling of 25951887488 in words is "twenty-five billion, nine hundred fifty-one million, eight hundred eighty-seven thousand, four hundred eighty-eight".