51116327065 has 4 divisors (see below), whose sum is σ = 61339592484. Its totient is φ = 40893061648.

The previous prime is 51116327063. The next prime is 51116327111. The reversal of 51116327065 is 56072361115.

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 29314918656 + 21801408409 = 171216^2 + 147653^2 .

It is a cyclic number.

It is not a de Polignac number, because 51116327065 - 2¹ = 51116327063 is a prime.

It is a super-2 number, since 2×51116327065² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51116327063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5111632702 + ... + 5111632711.

It is an arithmetic number, because the mean of its divisors is an integer number (15334898121).

Almost surely, 2^51116327065 is an apocalyptic number.

It is an amenable number.

51116327065 is a deficient number, since it is larger than the sum of its proper divisors (10223265419).

51116327065 is a wasteful number, since it uses less digits than its factorization.

51116327065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10223265418.

The product of its (nonzero) digits is 37800, while the sum is 37.

The spelling of 51116327065 in words is "fifty-one billion, one hundred sixteen million, three hundred twenty-seven thousand, sixty-five".