25394334736 has 15 divisors (see below), whose sum is σ = 49202758591. Its totient is φ = 12696848656.

The previous prime is 25394334683. The next prime is 25394334743. The reversal of 25394334736 is 63743349352.

It is a happy number.

The square root of 25394334736 is 159356.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25394334736.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 617505 + ... + 657343.

Almost surely, 2^25394334736 is an apocalyptic number.

25394334736 is the 159356-th square number.

It is an amenable number.

25394334736 is a deficient number, since it is larger than the sum of its proper divisors (23808423855).

25394334736 is an frugal number, since it uses more digits than its factorization.

25394334736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79686 (or 39841 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 49.

Multiplying 25394334736 by its sum of digits (49), we get a square (1244322402064 = 1115492²).

The spelling of 25394334736 in words is "twenty-five billion, three hundred ninety-four million, three hundred thirty-four thousand, seven hundred thirty-six".