68189386434 has 96 divisors (see below), whose sum is σ = 150832386432. Its totient is φ = 20428070400.

The previous prime is 68189386427. The next prime is 68189386439. The reversal of 68189386434 is 43468398186.

It is not an unprimeable number, because it can be changed into a prime (68189386439) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29893374 + ... + 29895654.

It is an arithmetic number, because the mean of its divisors is an integer number (1571170692).

Almost surely, 2^68189386434 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68189386434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75416193216).

68189386434 is an abundant number, since it is smaller than the sum of its proper divisors (82642999998).

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

68189386434 is a wasteful number, since it uses less digits than its factorization.

68189386434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2524 (or 2463 counting only the distinct ones).

The product of its digits is 23887872, while the sum is 60.

The spelling of 68189386434 in words is "sixty-eight billion, one hundred eighty-nine million, three hundred eighty-six thousand, four hundred thirty-four".