25518914423 has 2 divisors, whose sum is σ = 25518914424. Its totient is φ = 25518914422.

The previous prime is 25518914411. The next prime is 25518914431. The reversal of 25518914423 is 32441981552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25518914423 - 2⁸ = 25518914167 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25518914923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12759457211 + 12759457212.

It is an arithmetic number, because the mean of its divisors is an integer number (12759457212).

Almost surely, 2^25518914423 is an apocalyptic number.

25518914423 is a deficient number, since it is larger than the sum of its proper divisors (1).

25518914423 is an equidigital number, since it uses as much as digits as its factorization.

25518914423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345600, while the sum is 44.

The spelling of 25518914423 in words is "twenty-five billion, five hundred eighteen million, nine hundred fourteen thousand, four hundred twenty-three".