25317947394 has 24 divisors (see below), whose sum is σ = 55274302512. Its totient is φ = 8374892760.

The previous prime is 25317947387. The next prime is 25317947407. The reversal of 25317947394 is 49374971352.

25317947394 is a `hidden beast` number, since 2 + 531 + 79 + 4 + 7 + 39 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 25317947394.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5366164 + ... + 5370879.

It is an arithmetic number, because the mean of its divisors is an integer number (2303095938).

Almost surely, 2^25317947394 is an apocalyptic number.

25317947394 is an abundant number, since it is smaller than the sum of its proper divisors (29956355118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25317947394 is a wasteful number, since it uses less digits than its factorization.

25317947394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10737182 (or 10737179 counting only the distinct ones).

The product of its digits is 5715360, while the sum is 54.

The spelling of 25317947394 in words is "twenty-five billion, three hundred seventeen million, nine hundred forty-seven thousand, three hundred ninety-four".