51005606105 has 4 divisors (see below), whose sum is σ = 61206727332. Its totient is φ = 40804484880.

The previous prime is 51005606063. The next prime is 51005606117. The reversal of 51005606105 is 50160650015.

51005606105 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.

It can be written as a sum of positive squares in 2 ways, for example, as 21347255449 + 29658350656 = 146107^2 + 172216^2 .

It is a de Polignac number, because none of the positive numbers 2^k-51005606105 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5100560606 + ... + 5100560615.

It is an arithmetic number, because the mean of its divisors is an integer number (15301681833).

Almost surely, 2^51005606105 is an apocalyptic number.

It is an amenable number.

51005606105 is a deficient number, since it is larger than the sum of its proper divisors (10201121227).

51005606105 is a wasteful number, since it uses less digits than its factorization.

51005606105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10201121226.

The product of its (nonzero) digits is 4500, while the sum is 29.

The spelling of 51005606105 in words is "fifty-one billion, five million, six hundred six thousand, one hundred five".