25421575968 has 72 divisors (see below), whose sum is σ = 72366368256. Its totient is φ = 8465212800.

The previous prime is 25421575937. The next prime is 25421575973. The reversal of 25421575968 is 86957512452.

25421575968 is a `hidden beast` number, since 2 + 5 + 4 + 2 + 1 + 575 + 9 + 68 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 240873 + ... + 329943.

It is an arithmetic number, because the mean of its divisors is an integer number (1005088448).

Almost surely, 2^25421575968 is an apocalyptic number.

It is an amenable number.

25421575968 is an abundant number, since it is smaller than the sum of its proper divisors (46944792288).

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

25421575968 is a wasteful number, since it uses less digits than its factorization.

25421575968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90078 (or 90067 counting only the distinct ones).

The product of its digits is 6048000, while the sum is 54.

The spelling of 25421575968 in words is "twenty-five billion, four hundred twenty-one million, five hundred seventy-five thousand, nine hundred sixty-eight".