25492913317873 has 4 divisors (see below), whose sum is σ = 25493165771508. Its totient is φ = 25492660864240.

The previous prime is 25492913317849. The next prime is 25492913317889. The reversal of 25492913317873 is 37871331929452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5402500651584 + 20090412666289 = 2324328^2 + 4482233^2 .

It is a cyclic number.

It is not a de Polignac number, because 25492913317873 - 2¹⁷ = 25492913186801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25492913317273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126075286 + ... + 126277327.

It is an arithmetic number, because the mean of its divisors is an integer number (6373291442877).

Almost surely, 2^{25492913317873} is an apocalyptic number.

It is an amenable number.

25492913317873 is a deficient number, since it is larger than the sum of its proper divisors (252453635).

25492913317873 is a wasteful number, since it uses less digits than its factorization.

25492913317873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252453634.

The product of its digits is 68584320, while the sum is 64.

The spelling of 25492913317873 in words is "twenty-five trillion, four hundred ninety-two billion, nine hundred thirteen million, three hundred seventeen thousand, eight hundred seventy-three".