51668353716 has 96 divisors (see below), whose sum is σ = 139121928960. Its totient is φ = 14619377664.

The previous prime is 51668353699. The next prime is 51668353721. The reversal of 51668353716 is 61735386615.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4977780 + ... + 4988148.

It is an arithmetic number, because the mean of its divisors is an integer number (1449186760).

Almost surely, 2^51668353716 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 51668353716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69560964480).

51668353716 is an abundant number, since it is smaller than the sum of its proper divisors (87453575244).

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

51668353716 is a wasteful number, since it uses less digits than its factorization.

51668353716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10953 (or 10951 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 51.

The spelling of 51668353716 in words is "fifty-one billion, six hundred sixty-eight million, three hundred fifty-three thousand, seven hundred sixteen".