25283308640 has 96 divisors (see below), whose sum is σ = 60387132960. Its totient is φ = 10002714624.

The previous prime is 25283308621. The next prime is 25283308663. The reversal of 25283308640 is 4680338252.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14422004 + ... + 14423756.

It is an arithmetic number, because the mean of its divisors is an integer number (629032635).

Almost surely, 2^25283308640 is an apocalyptic number.

25283308640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25283308640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30193566480).

25283308640 is an abundant number, since it is smaller than the sum of its proper divisors (35103824320).

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

25283308640 is a wasteful number, since it uses less digits than its factorization.

25283308640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2704 (or 2696 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 41.

The spelling of 25283308640 in words is "twenty-five billion, two hundred eighty-three million, three hundred eight thousand, six hundred forty".