25809894063 has 48 divisors (see below), whose sum is σ = 40633164000. Its totient is φ = 15724606464.

The previous prime is 25809894059. The next prime is 25809894079. The reversal of 25809894063 is 36049890852.

It is not a de Polignac number, because 25809894063 - 2² = 25809894059 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25809894763) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8691643 + ... + 8694611.

It is an arithmetic number, because the mean of its divisors is an integer number (846524250).

Almost surely, 2^25809894063 is an apocalyptic number.

25809894063 is a deficient number, since it is larger than the sum of its proper divisors (14823269937).

25809894063 is a wasteful number, since it uses less digits than its factorization.

25809894063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4776 (or 4773 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 25809894063 in words is "twenty-five billion, eight hundred nine million, eight hundred ninety-four thousand, sixty-three".