25975663893 has 24 divisors (see below), whose sum is σ = 41454773568. Its totient is φ = 15589825152.

The previous prime is 25975663843. The next prime is 25975663907. The reversal of 25975663893 is 39836657952.

25975663893 is a `hidden beast` number, since 2 + 597 + 5 + 6 + 6 + 38 + 9 + 3 = 666.

It is not a de Polignac number, because 25975663893 - 2¹³ = 25975655701 is a prime.

It is a super-2 number, since 2×25975663893² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25975663893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25975663823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3687255 + ... + 3694292.

It is an arithmetic number, because the mean of its divisors is an integer number (1727282232).

Almost surely, 2^25975663893 is an apocalyptic number.

25975663893 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

25975663893 is a deficient number, since it is larger than the sum of its proper divisors (15479109675).

25975663893 is a wasteful number, since it uses less digits than its factorization.

25975663893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7381593 (or 7381590 counting only the distinct ones).

The product of its digits is 73483200, while the sum is 63.

The spelling of 25975663893 in words is "twenty-five billion, nine hundred seventy-five million, six hundred sixty-three thousand, eight hundred ninety-three".