51817208796 has 18 divisors (see below), whose sum is σ = 130982388992. Its totient is φ = 17272402920.

The previous prime is 51817208789. The next prime is 51817208797. The reversal of 51817208796 is 69780271815.

51817208796 is a `hidden beast` number, since 518 + 17 + 20 + 8 + 7 + 96 = 666.

51817208796 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51817208797) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 719683420 + ... + 719683491.

Almost surely, 2^51817208796 is an apocalyptic number.

It is an amenable number.

51817208796 is an abundant number, since it is smaller than the sum of its proper divisors (79165180196).

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

51817208796 is a wasteful number, since it uses less digits than its factorization.

51817208796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1439366921 (or 1439366916 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 54.

The spelling of 51817208796 in words is "fifty-one billion, eight hundred seventeen million, two hundred eight thousand, seven hundred ninety-six".