68170189064 has 8 divisors (see below), whose sum is σ = 127819104510. Its totient is φ = 34085094528.

The previous prime is 68170189037. The next prime is 68170189117. The reversal of 68170189064 is 46098107186.

It can be written as a sum of positive squares in only one way, i.e., 62715184900 + 5455004164 = 250430^2 + 73858^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4260636809 + ... + 4260636824.

Almost surely, 2^68170189064 is an apocalyptic number.

It is an amenable number.

68170189064 is a deficient number, since it is larger than the sum of its proper divisors (59648915446).

68170189064 is a wasteful number, since it uses less digits than its factorization.

68170189064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8521273639 (or 8521273635 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 50.

The spelling of 68170189064 in words is "sixty-eight billion, one hundred seventy million, one hundred eighty-nine thousand, sixty-four".