25501318313689 has 3 divisors (see below), whose sum is σ = 25501323363573. Its totient is φ = 25501313263806.

The previous prime is 25501318313687. The next prime is 25501318313701. The reversal of 25501318313689 is 98631381310552.

It is a happy number.

The square root of 25501318313689 is 5049883.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 25501318313689 - 2¹ = 25501318313687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25501318313687) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2524942 + ... + 7574824.

It is an arithmetic number, because the mean of its divisors is an integer number (8500441121191).

Almost surely, 2^{25501318313689} is an apocalyptic number.

25501318313689 is the 5049883-rd square number.

25501318313689 is the 2524942-nd centered octagonal number.

It is an amenable number.

25501318313689 is a deficient number, since it is larger than the sum of its proper divisors (5049884).

25501318313689 is an frugal number, since it uses more digits than its factorization.

25501318313689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10099766 (or 5049883 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 55.

The spelling of 25501318313689 in words is "twenty-five trillion, five hundred one billion, three hundred eighteen million, three hundred thirteen thousand, six hundred eighty-nine".