25105481656 has 16 divisors (see below), whose sum is σ = 48695977800. Its totient is φ = 12119887584.

The previous prime is 25105481593. The next prime is 25105481671. The reversal of 25105481656 is 65618450152.

It is a congruent number.

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, 54106410 + ... + 54106873.

Almost surely, 2^25105481656 is an apocalyptic number.

It is an amenable number.

25105481656 is a deficient number, since it is larger than the sum of its proper divisors (23590496144).

25105481656 is a wasteful number, since it uses less digits than its factorization.

25105481656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108213318 (or 108213314 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 43.

The spelling of 25105481656 in words is "twenty-five billion, one hundred five million, four hundred eighty-one thousand, six hundred fifty-six".