51634355789 has 8 divisors (see below), whose sum is σ = 53070498360. Its totient is φ = 50217235200.

The previous prime is 51634355767. The next prime is 51634355791. The reversal of 51634355789 is 98755343615.

51634355789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 680322889 + 50954032900 = 26083^2 + 225730^2 .

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 51634355789 - 2²⁰ = 51633307213 is a prime.

It is a super-2 number, since 2×51634355789² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51634355089) 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, 4749992 + ... + 4760849.

It is an arithmetic number, because the mean of its divisors is an integer number (6633812295).

Almost surely, 2^51634355789 is an apocalyptic number.

It is an amenable number.

51634355789 is a deficient number, since it is larger than the sum of its proper divisors (1436142571).

51634355789 is an equidigital number, since it uses as much as digits as its factorization.

51634355789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9510991.

The product of its digits is 13608000, while the sum is 56.

The spelling of 51634355789 in words is "fifty-one billion, six hundred thirty-four million, three hundred fifty-five thousand, seven hundred eighty-nine".