25695221892 has 48 divisors (see below), whose sum is σ = 60486858432. Its totient is φ = 8489328640.

The previous prime is 25695221873. The next prime is 25695221917. The reversal of 25695221892 is 29812259652.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1337668 + ... + 1356740.

It is an arithmetic number, because the mean of its divisors is an integer number (1260142884).

Almost surely, 2^25695221892 is an apocalyptic number.

It is an amenable number.

25695221892 is an abundant number, since it is smaller than the sum of its proper divisors (34791636540).

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

25695221892 is a wasteful number, since it uses less digits than its factorization.

25695221892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20068 (or 20066 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 51.

The spelling of 25695221892 in words is "twenty-five billion, six hundred ninety-five million, two hundred twenty-one thousand, eight hundred ninety-two".