68188413636 has 144 divisors (see below), whose sum is σ = 197960031360. Its totient is φ = 19386639360.

The previous prime is 68188413619. The next prime is 68188413637. The reversal of 68188413636 is 63631488186.

68188413636 is a `hidden beast` number, since 68 + 188 + 41 + 363 + 6 = 666.

68188413636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (68188413637) 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, 69793180 + ... + 69794156.

It is an arithmetic number, because the mean of its divisors is an integer number (1374722440).

Almost surely, 2^68188413636 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 68188413636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98980015680).

68188413636 is an abundant number, since it is smaller than the sum of its proper divisors (129771617724).

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

68188413636 is a wasteful number, since it uses less digits than its factorization.

68188413636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2074 (or 2069 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 54.

The spelling of 68188413636 in words is "sixty-eight billion, one hundred eighty-eight million, four hundred thirteen thousand, six hundred thirty-six".