25742959249 has 4 divisors (see below), whose sum is σ = 29420524864. Its totient is φ = 22065393636.

The previous prime is 25742959247. The next prime is 25742959283. The reversal of 25742959249 is 94295924752.

It is a happy number.

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 25742959249 - 2¹ = 25742959247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25742959193 and 25742959202.

It is not an unprimeable number, because it can be changed into a prime (25742959241) 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, 1838782797 + ... + 1838782810.

It is an arithmetic number, because the mean of its divisors is an integer number (7355131216).

Almost surely, 2^25742959249 is an apocalyptic number.

It is an amenable number.

25742959249 is a deficient number, since it is larger than the sum of its proper divisors (3677565615).

25742959249 is an equidigital number, since it uses as much as digits as its factorization.

25742959249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3677565614.

The product of its digits is 16329600, while the sum is 58.

The spelling of 25742959249 in words is "twenty-five billion, seven hundred forty-two million, nine hundred fifty-nine thousand, two hundred forty-nine".