25561678143393 has 24 divisors (see below), whose sum is σ = 43226252474496. Its totient is φ = 14250412900800.

The previous prime is 25561678143349. The next prime is 25561678143461. The reversal of 25561678143393 is 39334187616552.

It is a happy number.

25561678143393 is a `hidden beast` number, since 2 + 5 + 5 + 6 + 167 + 81 + 4 + 3 + 393 = 666.

It is not a de Polignac number, because 25561678143393 - 2⁹ = 25561678142881 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25561678143393.

It is not an unprimeable number, because it can be changed into a prime (25561678143193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4948057453 + ... + 4948062618.

It is an arithmetic number, because the mean of its divisors is an integer number (1801093853104).

Almost surely, 2^{25561678143393} is an apocalyptic number.

It is an amenable number.

25561678143393 is a deficient number, since it is larger than the sum of its proper divisors (17664574331103).

25561678143393 is a wasteful number, since it uses less digits than its factorization.

25561678143393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9896120125 (or 9896120122 counting only the distinct ones).

The product of its digits is 97977600, while the sum is 63.

The spelling of 25561678143393 in words is "twenty-five trillion, five hundred sixty-one billion, six hundred seventy-eight million, one hundred forty-three thousand, three hundred ninety-three".