25495466928 has 80 divisors (see below), whose sum is σ = 68169431520. Its totient is φ = 8201224192.

The previous prime is 25495466881. The next prime is 25495466959. The reversal of 25495466928 is 82966459452.

It is a Cunningham number, because it is equal to 159673²-1.

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, 3828850 + ... + 3835502.

It is an arithmetic number, because the mean of its divisors is an integer number (852117894).

Almost surely, 2^25495466928 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 25495466928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34084715760).

25495466928 is an abundant number, since it is smaller than the sum of its proper divisors (42673964592).

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

25495466928 is a wasteful number, since it uses less digits than its factorization.

25495466928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9446 (or 9440 counting only the distinct ones).

The product of its digits is 37324800, while the sum is 60.

The spelling of 25495466928 in words is "twenty-five billion, four hundred ninety-five million, four hundred sixty-six thousand, nine hundred twenty-eight".