25623250513 has 4 divisors (see below), whose sum is σ = 29283714880. Its totient is φ = 21962786148.

The previous prime is 25623250483. The next prime is 25623250559. The reversal of 25623250513 is 31505232652.

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 25623250513 - 2³³ = 17033315921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25623250013) 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 3 ways as a sum of consecutive naturals, for example, 1830232173 + ... + 1830232186.

It is an arithmetic number, because the mean of its divisors is an integer number (7320928720).

Almost surely, 2^25623250513 is an apocalyptic number.

It is an amenable number.

25623250513 is a deficient number, since it is larger than the sum of its proper divisors (3660464367).

25623250513 is an equidigital number, since it uses as much as digits as its factorization.

25623250513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3660464366.

The product of its (nonzero) digits is 54000, while the sum is 34.

The spelling of 25623250513 in words is "twenty-five billion, six hundred twenty-three million, two hundred fifty thousand, five hundred thirteen".