25512643897872 has 320 divisors, whose sum is σ = 69829420916736. Its totient is φ = 8010567290880.

The previous prime is 25512643897859. The next prime is 25512643897901. The reversal of 25512643897872 is 27879834621552.

It is a super-2 number, since 2×25512643897872² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a junction number, because it is equal to n+sod(n) for n = 25512643897797 and 25512643897806.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26770874548 + ... + 26770875500.

Almost surely, 2^{25512643897872} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25512643897872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34914710458368).

25512643897872 is an abundant number, since it is smaller than the sum of its proper divisors (44316777018864).

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

25512643897872 is a wasteful number, since it uses less digits than its factorization.

25512643897872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2158 (or 2152 counting only the distinct ones).

The product of its digits is 406425600, while the sum is 69.

The spelling of 25512643897872 in words is "twenty-five trillion, five hundred twelve billion, six hundred forty-three million, eight hundred ninety-seven thousand, eight hundred seventy-two".