25645340466 has 12 divisors (see below), whose sum is σ = 55564904382. Its totient is φ = 8548446816.

The previous prime is 25645340447. The next prime is 25645340473. The reversal of 25645340466 is 66404354652.

It is a happy number.

25645340466 is a `hidden beast` number, since 2 + 56 + 4 + 534 + 0 + 4 + 66 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13692510225 + 11952830241 = 117015^2 + 109329^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 712370551 + ... + 712370586.

Almost surely, 2^25645340466 is an apocalyptic number.

25645340466 is an abundant number, since it is smaller than the sum of its proper divisors (29919563916).

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

25645340466 is a wasteful number, since it uses less digits than its factorization.

25645340466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424741145 (or 1424741142 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 45.

The spelling of 25645340466 in words is "twenty-five billion, six hundred forty-five million, three hundred forty thousand, four hundred sixty-six".