68164721418 has 8 divisors (see below), whose sum is σ = 136329442848. Its totient is φ = 22721573804.

The previous prime is 68164721371. The next prime is 68164721459. The reversal of 68164721418 is 81412746186.

It is a sphenic number, since it is the product of 3 distinct primes.

68164721418 is an admirable number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5680393446 + ... + 5680393457.

It is an arithmetic number, because the mean of its divisors is an integer number (17041180356).

Almost surely, 2^68164721418 is an apocalyptic number.

68164721418 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

68164721418 is a wasteful number, since it uses less digits than its factorization.

68164721418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11360786908.

The product of its digits is 516096, while the sum is 48.

The spelling of 68164721418 in words is "sixty-eight billion, one hundred sixty-four million, seven hundred twenty-one thousand, four hundred eighteen".