51816321336 has 32 divisors (see below), whose sum is σ = 139505481360. Its totient is φ = 15943483392.

The previous prime is 51816321331. The next prime is 51816321341. The reversal of 51816321336 is 63312361815.

It is an interprime number because it is at equal distance from previous prime (51816321331) and next prime (51816321341).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 51816321294 and 51816321303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51816321331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83038665 + ... + 83039288.

Almost surely, 2^51816321336 is an apocalyptic number.

It is an amenable number.

51816321336 is an abundant number, since it is smaller than the sum of its proper divisors (87689160024).

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

51816321336 is a wasteful number, since it uses less digits than its factorization.

51816321336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166077975 (or 166077971 counting only the distinct ones).

The product of its digits is 77760, while the sum is 39.

The spelling of 51816321336 in words is "fifty-one billion, eight hundred sixteen million, three hundred twenty-one thousand, three hundred thirty-six".