25151981760 has 224 divisors, whose sum is σ = 88835788800. Its totient is φ = 6699248640.

The previous prime is 25151981741. The next prime is 25151981801. The reversal of 25151981760 is 6718915152.

25151981760 is a `hidden beast` number, since 2 + 51 + 519 + 81 + 7 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12708451 + ... + 12710429.

Almost surely, 2^25151981760 is an apocalyptic number.

25151981760 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 25151981760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44417894400).

25151981760 is an abundant number, since it is smaller than the sum of its proper divisors (63683807040).

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

25151981760 is a wasteful number, since it uses less digits than its factorization.

25151981760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3476 (or 3460 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 45.

The spelling of 25151981760 in words is "twenty-five billion, one hundred fifty-one million, nine hundred eighty-one thousand, seven hundred sixty".