68581656994 has 16 divisors (see below), whose sum is σ = 104858893440. Its totient is φ = 33631390480.

The previous prime is 68581656991. The next prime is 68581657033. The reversal of 68581656994 is 49965618586.

It is not an unprimeable number, because it can be changed into a prime (68581656991) 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, 623389 + ... + 725104.

It is an arithmetic number, because the mean of its divisors is an integer number (6553680840).

Almost surely, 2^68581656994 is an apocalyptic number.

68581656994 is a deficient number, since it is larger than the sum of its proper divisors (36277236446).

68581656994 is a wasteful number, since it uses less digits than its factorization.

68581656994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348985.

The product of its digits is 111974400, while the sum is 67.

The spelling of 68581656994 in words is "sixty-eight billion, five hundred eighty-one million, six hundred fifty-six thousand, nine hundred ninety-four".