68319928236 has 48 divisors (see below), whose sum is σ = 192903330816. Its totient is φ = 18371745024.

The previous prime is 68319928231. The next prime is 68319928247. The reversal of 68319928236 is 63282991386.

It is a super-2 number, since 2×68319928236² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68319928231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23920116 + ... + 23922971.

It is an arithmetic number, because the mean of its divisors is an integer number (4018819392).

Almost surely, 2^68319928236 is an apocalyptic number.

It is an amenable number.

68319928236 is an abundant number, since it is smaller than the sum of its proper divisors (124583402580).

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

68319928236 is a wasteful number, since it uses less digits than its factorization.

68319928236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47843118 (or 47843116 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 57.

The spelling of 68319928236 in words is "sixty-eight billion, three hundred nineteen million, nine hundred twenty-eight thousand, two hundred thirty-six".