51685349050 has 96 divisors (see below), whose sum is σ = 103152616560. Its totient is φ = 19198771200.

The previous prime is 51685349041. The next prime is 51685349087. The reversal of 51685349050 is 5094358615.

It can be written as a sum of positive squares in 24 ways, for example, as 13213272601 + 38472076449 = 114949^2 + 196143^2 .

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 47 ways as a sum of consecutive naturals, for example, 34710706 + ... + 34712194.

Almost surely, 2^51685349050 is an apocalyptic number.

51685349050 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51685349050 is a deficient number, since it is larger than the sum of its proper divisors (51467267510).

51685349050 is a wasteful number, since it uses less digits than its factorization.

51685349050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2036 (or 2031 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 46.

The spelling of 51685349050 in words is "fifty-one billion, six hundred eighty-five million, three hundred forty-nine thousand, fifty".