25231894968 has 256 divisors, whose sum is σ = 77823360000. Its totient is φ = 6795436032.

The previous prime is 25231894967. The next prime is 25231894969. The reversal of 25231894968 is 86949813252.

It is an interprime number because it is at equal distance from previous prime (25231894967) and next prime (25231894969).

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25231894967) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 55211796 + ... + 55212252.

It is an arithmetic number, because the mean of its divisors is an integer number (303997500).

Almost surely, 2^25231894968 is an apocalyptic number.

25231894968 is a gapful number since it is divisible by the number (28) 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 25231894968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38911680000).

25231894968 is an abundant number, since it is smaller than the sum of its proper divisors (52591465032).

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

25231894968 is a wasteful number, since it uses less digits than its factorization.

25231894968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859 (or 841 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 57.

The spelling of 25231894968 in words is "twenty-five billion, two hundred thirty-one million, eight hundred ninety-four thousand, nine hundred sixty-eight".