25493315680 has 48 divisors (see below), whose sum is σ = 68831955360. Its totient is φ = 8740564992.

The previous prime is 25493315633. The next prime is 25493315707. The reversal of 25493315680 is 8651339452.

It is a self number, because there is not a number n which added to its sum of digits gives 25493315680.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11379825 + ... + 11382064.

It is an arithmetic number, because the mean of its divisors is an integer number (1433999070).

Almost surely, 2^25493315680 is an apocalyptic number.

25493315680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25493315680 is an abundant number, since it is smaller than the sum of its proper divisors (43338639680).

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

25493315680 is a wasteful number, since it uses less digits than its factorization.

25493315680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22761911 (or 22761903 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 46.

The spelling of 25493315680 in words is "twenty-five billion, four hundred ninety-three million, three hundred fifteen thousand, six hundred eighty".