51605105105 has 8 divisors (see below), whose sum is σ = 61927824192. Its totient is φ = 41282952048.

The previous prime is 51605105099. The next prime is 51605105117. The reversal of 51605105105 is 50150150615.

It is a happy number.

51605105105 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 51605105105 - 2⁸ = 51605104849 is a prime.

It is a super-2 number, since 2×51605105105² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95012 + ... + 335018.

It is an arithmetic number, because the mean of its divisors is an integer number (7740978024).

Almost surely, 2^51605105105 is an apocalyptic number.

It is an amenable number.

51605105105 is a deficient number, since it is larger than the sum of its proper divisors (10322719087).

51605105105 is a wasteful number, since it uses less digits than its factorization.

51605105105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283015.

The product of its (nonzero) digits is 3750, while the sum is 29.

It can be divided in two parts, 5160510 and 5105, that added together give a palindrome (5165615).

The spelling of 51605105105 in words is "fifty-one billion, six hundred five million, one hundred five thousand, one hundred five".