51306766347 has 4 divisors (see below), whose sum is σ = 68409021800. Its totient is φ = 34204510896.

The previous prime is 51306766289. The next prime is 51306766373. The reversal of 51306766347 is 74366760315.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-51306766347 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51306766296 and 51306766305.

It is not an unprimeable number, because it can be changed into a prime (51306765347) 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, 8551127722 + ... + 8551127727.

It is an arithmetic number, because the mean of its divisors is an integer number (17102255450).

Almost surely, 2^51306766347 is an apocalyptic number.

51306766347 is a deficient number, since it is larger than the sum of its proper divisors (17102255453).

51306766347 is a wasteful number, since it uses less digits than its factorization.

51306766347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17102255452.

The product of its (nonzero) digits is 1905120, while the sum is 48.

The spelling of 51306766347 in words is "fifty-one billion, three hundred six million, seven hundred sixty-six thousand, three hundred forty-seven".