51805079212 has 36 divisors (see below), whose sum is σ = 95342653560. Its totient is φ = 24616255104.

The previous prime is 51805079113. The next prime is 51805079219. The reversal of 51805079212 is 21297050815.

51805079212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (51805079219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 125464 + ... + 345472.

Almost surely, 2^51805079212 is an apocalyptic number.

It is an amenable number.

51805079212 is a deficient number, since it is larger than the sum of its proper divisors (43537574348).

51805079212 is a wasteful number, since it uses less digits than its factorization.

51805079212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220130 (or 220091 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 40.

The spelling of 51805079212 in words is "fifty-one billion, eight hundred five million, seventy-nine thousand, two hundred twelve".