51693344836 has 96 divisors (see below), whose sum is σ = 111124500480. Its totient is φ = 20557494144.

The previous prime is 51693344827. The next prime is 51693344869. The reversal of 51693344836 is 63844339615.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8551231 + ... + 8557273.

It is an arithmetic number, because the mean of its divisors is an integer number (1157546880).

Almost surely, 2^51693344836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51693344836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55562250240).

51693344836 is an abundant number, since it is smaller than the sum of its proper divisors (59431155644).

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

51693344836 is a wasteful number, since it uses less digits than its factorization.

51693344836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6473 (or 6471 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 52.

The spelling of 51693344836 in words is "fifty-one billion, six hundred ninety-three million, three hundred forty-four thousand, eight hundred thirty-six".