51705207889 has 8 divisors (see below), whose sum is σ = 57628095840. Its totient is φ = 46102476096.

The previous prime is 51705207863. The next prime is 51705207901. The reversal of 51705207889 is 98870250715.

It is a happy number.

51705207889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51705207889 - 2⁵ = 51705207857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51705207839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80038699 + ... + 80039344.

It is an arithmetic number, because the mean of its divisors is an integer number (7203511980).

Almost surely, 2^51705207889 is an apocalyptic number.

It is an amenable number.

51705207889 is a deficient number, since it is larger than the sum of its proper divisors (5922887951).

51705207889 is a wasteful number, since it uses less digits than its factorization.

51705207889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160078079.

The product of its (nonzero) digits is 1411200, while the sum is 52.

The spelling of 51705207889 in words is "fifty-one billion, seven hundred five million, two hundred seven thousand, eight hundred eighty-nine".