51836705389 has 4 divisors (see below), whose sum is σ = 59241949024. Its totient is φ = 44431461756.

The previous prime is 51836705387. The next prime is 51836705419. The reversal of 51836705389 is 98350763815.

51836705389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 51836705389 - 2¹ = 51836705387 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 (51836705387) 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, 3702621807 + ... + 3702621820.

It is an arithmetic number, because the mean of its divisors is an integer number (14810487256).

Almost surely, 2^51836705389 is an apocalyptic number.

It is an amenable number.

51836705389 is a deficient number, since it is larger than the sum of its proper divisors (7405243635).

51836705389 is an equidigital number, since it uses as much as digits as its factorization.

51836705389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7405243634.

The product of its (nonzero) digits is 5443200, while the sum is 55.

The spelling of 51836705389 in words is "fifty-one billion, eight hundred thirty-six million, seven hundred five thousand, three hundred eighty-nine".