68156326368 has 540 divisors, whose sum is σ = 229607321328. Its totient is φ = 19821335040.

The previous prime is 68156326331. The next prime is 68156326369. The reversal of 68156326368 is 86362365186.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68156326369) by changing a digit.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 158135113 + ... + 158135543.

Almost surely, 2^68156326368 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 68156326368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114803660664).

68156326368 is an abundant number, since it is smaller than the sum of its proper divisors (161450994960).

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

68156326368 is a wasteful number, since it uses less digits than its factorization.

68156326368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517 (or 468 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 54.

The spelling of 68156326368 in words is "sixty-eight billion, one hundred fifty-six million, three hundred twenty-six thousand, three hundred sixty-eight".