25693894466 has 8 divisors (see below), whose sum is σ = 38542149324. Its totient is φ = 12846511360.

The previous prime is 25693894459. The next prime is 25693894477. The reversal of 25693894466 is 66449839652.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 22914390625 + 2779503841 = 151375^2 + 52721^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 25693894399 and 25693894408.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138455 + ... + 265626.

Almost surely, 2^25693894466 is an apocalyptic number.

25693894466 is a deficient number, since it is larger than the sum of its proper divisors (12848254858).

25693894466 is a wasteful number, since it uses less digits than its factorization.

25693894466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435876.

The product of its digits is 67184640, while the sum is 62.

The spelling of 25693894466 in words is "twenty-five billion, six hundred ninety-three million, eight hundred ninety-four thousand, four hundred sixty-six".