25993397684 has 24 divisors (see below), whose sum is σ = 46364179848. Its totient is φ = 12748861440.

The previous prime is 25993397671. The next prime is 25993397707. The reversal of 25993397684 is 48679339952.

It can be written as a sum of positive squares in 4 ways, for example, as 1363234084 + 24630163600 = 36922^2 + 156940^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25993397684.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 252587 + ... + 340274.

It is an arithmetic number, because the mean of its divisors is an integer number (1931840827).

Almost surely, 2^25993397684 is an apocalyptic number.

It is an amenable number.

25993397684 is a deficient number, since it is larger than the sum of its proper divisors (20370782164).

25993397684 is a wasteful number, since it uses less digits than its factorization.

25993397684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593075 (or 593073 counting only the distinct ones).

The product of its digits is 88179840, while the sum is 65.

The spelling of 25993397684 in words is "twenty-five billion, nine hundred ninety-three million, three hundred ninety-seven thousand, six hundred eighty-four".