25983693513 has 16 divisors (see below), whose sum is σ = 38891213760. Its totient is φ = 17143878528.

The previous prime is 25983693497. The next prime is 25983693559. The reversal of 25983693513 is 31539638952.

25983693513 is a `hidden beast` number, since 2 + 5 + 9 + 8 + 36 + 93 + 513 = 666.

It is not a de Polignac number, because 25983693513 - 2⁴ = 25983693497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25983693513.

It is not an unprimeable number, because it can be changed into a prime (25983693613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4957995 + ... + 4963232.

It is an arithmetic number, because the mean of its divisors is an integer number (2430700860).

Almost surely, 2^25983693513 is an apocalyptic number.

It is an amenable number.

25983693513 is a deficient number, since it is larger than the sum of its proper divisors (12907520247).

25983693513 is an equidigital number, since it uses as much as digits as its factorization.

25983693513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9921333 (or 9921327 counting only the distinct ones).

The product of its digits is 5248800, while the sum is 54.

The spelling of 25983693513 in words is "twenty-five billion, nine hundred eighty-three million, six hundred ninety-three thousand, five hundred thirteen".