25601909997466 has 16 divisors (see below), whose sum is σ = 41894385075360. Its totient is φ = 11637134446480.

The previous prime is 25601909997407. The next prime is 25601909997491. The reversal of 25601909997466 is 66479990910652.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2145601 + ... + 7470436.

It is an arithmetic number, because the mean of its divisors is an integer number (2618399067210).

Almost surely, 2^{25601909997466} is an apocalyptic number.

25601909997466 is a deficient number, since it is larger than the sum of its proper divisors (16292475077894).

25601909997466 is a wasteful number, since it uses less digits than its factorization.

25601909997466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9737069.

The product of its (nonzero) digits is 396809280, while the sum is 73.

The spelling of 25601909997466 in words is "twenty-five trillion, six hundred one billion, nine hundred nine million, nine hundred ninety-seven thousand, four hundred sixty-six".