25123404323 has 4 divisors (see below), whose sum is σ = 25989728640. Its totient is φ = 24257080008.

The previous prime is 25123404289. The next prime is 25123404329. The reversal of 25123404323 is 32340432152.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25123404323 - 2⁶ = 25123404259 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 866324287 = 25123404323 / (2 + 5 + 1 + 2 + 3 + 4 + 0 + 4 + 3 + 2 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25123404329) 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, 433162115 + ... + 433162172.

It is an arithmetic number, because the mean of its divisors is an integer number (6497432160).

Almost surely, 2^25123404323 is an apocalyptic number.

25123404323 is a deficient number, since it is larger than the sum of its proper divisors (866324317).

25123404323 is an equidigital number, since it uses as much as digits as its factorization.

25123404323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866324316.

The product of its (nonzero) digits is 17280, while the sum is 29.

Adding to 25123404323 its reverse (32340432152), we get a palindrome (57463836475).

The spelling of 25123404323 in words is "twenty-five billion, one hundred twenty-three million, four hundred four thousand, three hundred twenty-three".