68390909394 has 16 divisors (see below), whose sum is σ = 136812316032. Its totient is φ = 22791886928.

The previous prime is 68390909291. The next prime is 68390909399. The reversal of 68390909394 is 49390909386.

It is not an unprimeable number, because it can be changed into a prime (68390909399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1241514 + ... + 1295429.

It is an arithmetic number, because the mean of its divisors is an integer number (8550769752).

Almost surely, 2^68390909394 is an apocalyptic number.

68390909394 is an abundant number, since it is smaller than the sum of its proper divisors (68421406638).

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

68390909394 is a wasteful number, since it uses less digits than its factorization.

68390909394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2541441.

The product of its (nonzero) digits is 11337408, while the sum is 60.

The spelling of 68390909394 in words is "sixty-eight billion, three hundred ninety million, nine hundred nine thousand, three hundred ninety-four".