25863500673 has 6 divisors (see below), whose sum is σ = 37358389874. Its totient is φ = 17242333776.

The previous prime is 25863500657. The next prime is 25863500699. The reversal of 25863500673 is 37600536852.

25863500673 is a `hidden beast` number, since 2 + 5 + 8 + 635 + 0 + 0 + 6 + 7 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15398824464 + 10464676209 = 124092^2 + 102297^2 .

It is not a de Polignac number, because 25863500673 - 2⁴ = 25863500657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25863500633) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1436861140 + ... + 1436861157.

Almost surely, 2^25863500673 is an apocalyptic number.

It is an amenable number.

25863500673 is a deficient number, since it is larger than the sum of its proper divisors (11494889201).

25863500673 is a wasteful number, since it uses less digits than its factorization.

25863500673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2873722303 (or 2873722300 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The spelling of 25863500673 in words is "twenty-five billion, eight hundred sixty-three million, five hundred thousand, six hundred seventy-three".