25583668993 has 4 divisors (see below), whose sum is σ = 25620693808. Its totient is φ = 25546644180.

The previous prime is 25583668961. The next prime is 25583668997. The reversal of 25583668993 is 39986638552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25583668993 - 2⁵ = 25583668961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25583668997) 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, 18511371 + ... + 18512752.

It is an arithmetic number, because the mean of its divisors is an integer number (6405173452).

Almost surely, 2^25583668993 is an apocalyptic number.

It is an amenable number.

25583668993 is a deficient number, since it is larger than the sum of its proper divisors (37024815).

25583668993 is an equidigital number, since it uses as much as digits as its factorization.

25583668993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37024814.

The product of its digits is 83980800, while the sum is 64.

The spelling of 25583668993 in words is "twenty-five billion, five hundred eighty-three million, six hundred sixty-eight thousand, nine hundred ninety-three".