68138336364 has 96 divisors (see below), whose sum is σ = 187667504640. Its totient is φ = 18839029248.

The previous prime is 68138336323. The next prime is 68138336393. The reversal of 68138336364 is 46363383186.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 220167 + ... + 429825.

It is an arithmetic number, because the mean of its divisors is an integer number (1954869840).

Almost surely, 2^68138336364 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 68138336364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93833752320).

68138336364 is an abundant number, since it is smaller than the sum of its proper divisors (119529168276).

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

68138336364 is a wasteful number, since it uses less digits than its factorization.

68138336364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209799 (or 209797 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 51.

The spelling of 68138336364 in words is "sixty-eight billion, one hundred thirty-eight million, three hundred thirty-six thousand, three hundred sixty-four".