25440422329 has 4 divisors (see below), whose sum is σ = 29074768384. Its totient is φ = 21806076276.

The previous prime is 25440422323. The next prime is 25440422339. The reversal of 25440422329 is 92322404452.

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 25440422329 - 2¹¹ = 25440420281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25440422323) 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, 1817173017 + ... + 1817173030.

It is an arithmetic number, because the mean of its divisors is an integer number (7268692096).

Almost surely, 2^25440422329 is an apocalyptic number.

It is an amenable number.

25440422329 is a deficient number, since it is larger than the sum of its proper divisors (3634346055).

25440422329 is an equidigital number, since it uses as much as digits as its factorization.

25440422329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3634346054.

The product of its (nonzero) digits is 138240, while the sum is 37.

The spelling of 25440422329 in words is "twenty-five billion, four hundred forty million, four hundred twenty-two thousand, three hundred twenty-nine".