25691263984 has 20 divisors (see below), whose sum is σ = 49798453320. Its totient is φ = 12840050240.

The previous prime is 25691263907. The next prime is 25691263987. The reversal of 25691263984 is 48936219652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25691263987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310762 + ... + 384649.

It is an arithmetic number, because the mean of its divisors is an integer number (2489922666).

Almost surely, 2^25691263984 is an apocalyptic number.

It is an amenable number.

25691263984 is a deficient number, since it is larger than the sum of its proper divisors (24107189336).

25691263984 is a wasteful number, since it uses less digits than its factorization.

25691263984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697728 (or 697722 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 55.

The spelling of 25691263984 in words is "twenty-five billion, six hundred ninety-one million, two hundred sixty-three thousand, nine hundred eighty-four".