25691263983 has 48 divisors (see below), whose sum is σ = 46824051456. Its totient is φ = 13185285120.

The previous prime is 25691263907. The next prime is 25691263987. The reversal of 25691263983 is 38936219652.

25691263983 is a `hidden beast` number, since 2 + 569 + 12 + 63 + 9 + 8 + 3 = 666.

It is not a de Polignac number, because 25691263983 - 2¹³ = 25691255791 is a prime.

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 pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 165810 + ... + 280847.

It is an arithmetic number, because the mean of its divisors is an integer number (975501072).

Almost surely, 2^25691263983 is an apocalyptic number.

25691263983 is a deficient number, since it is larger than the sum of its proper divisors (21132787473).

25691263983 is a wasteful number, since it uses less digits than its factorization.

25691263983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446764 (or 446761 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 54.

The spelling of 25691263983 in words is "twenty-five billion, six hundred ninety-one million, two hundred sixty-three thousand, nine hundred eighty-three".