51680662186 has 4 divisors (see below), whose sum is σ = 77520993282. Its totient is φ = 25840331092.

The previous prime is 51680662129. The next prime is 51680662213. The reversal of 51680662186 is 68126608615.

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

It can be written as a sum of positive squares in only one way, i.e., 50661456561 + 1019205625 = 225081^2 + 31925^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12920165545 + ... + 12920165548.

Almost surely, 2^51680662186 is an apocalyptic number.

51680662186 is a deficient number, since it is larger than the sum of its proper divisors (25840331096).

51680662186 is a wasteful number, since it uses less digits than its factorization.

51680662186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25840331095.

The product of its (nonzero) digits is 829440, while the sum is 49.

The spelling of 51680662186 in words is "fifty-one billion, six hundred eighty million, six hundred sixty-two thousand, one hundred eighty-six".