25897316931780 has 384 divisors, whose sum is σ = 92141192478720. Its totient is φ = 5300731860480.

The previous prime is 25897316931779. The next prime is 25897316931781. The reversal of 25897316931780 is 8713961379852.

It is an interprime number because it is at equal distance from previous prime (25897316931779) and next prime (25897316931781).

It is a hoax number, since the sum of its digits (69) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (25897316931781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 9420057 + ... + 11854623.

It is an arithmetic number, because the mean of its divisors is an integer number (239951022080).

Almost surely, 2^{25897316931780} is an apocalyptic number.

25897316931780 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 25897316931780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46070596239360).

25897316931780 is an abundant number, since it is smaller than the sum of its proper divisors (66243875546940).

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

25897316931780 is a wasteful number, since it uses less digits than its factorization.

25897316931780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2434679 (or 2434677 counting only the distinct ones).

The product of its (nonzero) digits is 137168640, while the sum is 69.

The spelling of 25897316931780 in words is "twenty-five trillion, eight hundred ninety-seven billion, three hundred sixteen million, nine hundred thirty-one thousand, seven hundred eighty".