51668467169 has 16 divisors (see below), whose sum is σ = 56750086080. Its totient is φ = 46651200960.

The previous prime is 51668467141. The next prime is 51668467177. The reversal of 51668467169 is 96176486615.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51668467169 is a prime.

It is a super-2 number, since 2×51668467169² (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 (51068467169) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4863107 + ... + 4873719.

It is an arithmetic number, because the mean of its divisors is an integer number (3546880380).

Almost surely, 2^51668467169 is an apocalyptic number.

It is an amenable number.

51668467169 is a deficient number, since it is larger than the sum of its proper divisors (5081618911).

51668467169 is a wasteful number, since it uses less digits than its factorization.

51668467169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13600.

The product of its digits is 13063680, while the sum is 59.

The spelling of 51668467169 in words is "fifty-one billion, six hundred sixty-eight million, four hundred sixty-seven thousand, one hundred sixty-nine".