5254718390861 has 4 divisors (see below), whose sum is σ = 5306745305724. Its totient is φ = 5202691476000.

The previous prime is 5254718390819. The next prime is 5254718390917. The reversal of 5254718390861 is 1680938174525.

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 4653986436100 + 600731954761 = 2157310^2 + 775069^2 .

It is a cyclic number.

It is not a de Polignac number, because 5254718390861 - 2¹⁸ = 5254718128717 is a prime.

It is a super-2 number, since 2×5254718390861² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5254718390861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5254718390161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26013457280 + ... + 26013457481.

It is an arithmetic number, because the mean of its divisors is an integer number (1326686326431).

It is a 2-persistent number, because it is pandigital, and so is 2⋅5254718390861 = 10509436781722, but 3⋅5254718390861 = 15764155172583 is not.

Almost surely, 2^{5254718390861} is an apocalyptic number.

It is an amenable number.

5254718390861 is a deficient number, since it is larger than the sum of its proper divisors (52026914863).

5254718390861 is a wasteful number, since it uses less digits than its factorization.

5254718390861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52026914862.

The product of its (nonzero) digits is 14515200, while the sum is 59.

The spelling of 5254718390861 in words is "five trillion, two hundred fifty-four billion, seven hundred eighteen million, three hundred ninety thousand, eight hundred sixty-one".