25695521466 has 32 divisors (see below), whose sum is σ = 51969835008. Its totient is φ = 8469246960.

The previous prime is 25695521447. The next prime is 25695521479. The reversal of 25695521466 is 66412559652.

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, 124251 + ... + 258513.

It is an arithmetic number, because the mean of its divisors is an integer number (1624057344).

Almost surely, 2^25695521466 is an apocalyptic number.

25695521466 is an abundant number, since it is smaller than the sum of its proper divisors (26274313542).

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

25695521466 is a wasteful number, since it uses less digits than its factorization.

25695521466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134626.

The product of its digits is 3888000, while the sum is 51.

The spelling of 25695521466 in words is "twenty-five billion, six hundred ninety-five million, five hundred twenty-one thousand, four hundred sixty-six".