51806670212 has 48 divisors (see below), whose sum is σ = 103939104192. Its totient is φ = 22379172480.

The previous prime is 51806670193. The next prime is 51806670217. The reversal of 51806670212 is 21207660815.

It is not an unprimeable number, because it can be changed into a prime (51806670217) 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 15 ways as a sum of consecutive naturals, for example, 300023 + ... + 440030.

It is an arithmetic number, because the mean of its divisors is an integer number (2165398004).

Almost surely, 2^51806670212 is an apocalyptic number.

It is an amenable number.

51806670212 is an abundant number, since it is smaller than the sum of its proper divisors (52132433980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51806670212 is a wasteful number, since it uses less digits than its factorization.

51806670212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740148 (or 740146 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The spelling of 51806670212 in words is "fifty-one billion, eight hundred six million, six hundred seventy thousand, two hundred twelve".