25442249903 has 8 divisors (see below), whose sum is σ = 29625477408. Its totient is φ = 21396177504.

The previous prime is 25442249893. The next prime is 25442249923. The reversal of 25442249903 is 30994224452.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25442249903 - 2⁴ = 25442249887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25442249923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34288376 + ... + 34289117.

It is an arithmetic number, because the mean of its divisors is an integer number (3703184676).

Almost surely, 2^25442249903 is an apocalyptic number.

25442249903 is a deficient number, since it is larger than the sum of its proper divisors (4183227505).

25442249903 is an equidigital number, since it uses as much as digits as its factorization.

25442249903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68577553.

The product of its (nonzero) digits is 622080, while the sum is 44.

The spelling of 25442249903 in words is "twenty-five billion, four hundred forty-two million, two hundred forty-nine thousand, nine hundred three".