52717357126821 has 4 divisors (see below), whose sum is σ = 70289809502432. Its totient is φ = 35144904751212.

The previous prime is 52717357126817. The next prime is 52717357126843. The reversal of 52717357126821 is 12862175371725.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 52717357126821 - 2² = 52717357126817 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52717357126801) 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, 8786226187801 + ... + 8786226187806.

It is an arithmetic number, because the mean of its divisors is an integer number (17572452375608).

Almost surely, 2^{52717357126821} is an apocalyptic number.

It is an amenable number.

52717357126821 is a deficient number, since it is larger than the sum of its proper divisors (17572452375611).

52717357126821 is a wasteful number, since it uses less digits than its factorization.

52717357126821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17572452375610.

The product of its digits is 9878400, while the sum is 57.

The spelling of 52717357126821 in words is "fifty-two trillion, seven hundred seventeen billion, three hundred fifty-seven million, one hundred twenty-six thousand, eight hundred twenty-one".