51061335581705 has 4 divisors (see below), whose sum is σ = 61273602698052. Its totient is φ = 40849068465360.

The previous prime is 51061335581689. The next prime is 51061335581719. The reversal of 51061335581705 is 50718553316015.

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 17627544999289 + 33433790582416 = 4198517^2 + 5782196^2 .

It is not a de Polignac number, because 51061335581705 - 2⁴ = 51061335581689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5106133558166 + ... + 5106133558175.

It is an arithmetic number, because the mean of its divisors is an integer number (15318400674513).

Almost surely, 2^{51061335581705} is an apocalyptic number.

It is an amenable number.

51061335581705 is a deficient number, since it is larger than the sum of its proper divisors (10212267116347).

51061335581705 is a wasteful number, since it uses less digits than its factorization.

51061335581705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10212267116346.

The product of its (nonzero) digits is 1890000, while the sum is 50.

The spelling of 51061335581705 in words is "fifty-one trillion, sixty-one billion, three hundred thirty-five million, five hundred eighty-one thousand, seven hundred five".