68911441808 has 90 divisors (see below), whose sum is σ = 155497402998. Its totient is φ = 29460456960.

The previous prime is 68911441771. The next prime is 68911441811. The reversal of 68911441808 is 80814411986.

It can be written as a sum of positive squares in only one way, i.e., 64857827584 + 4053614224 = 254672^2 + 63668^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 47622941 + ... + 47624387.

Almost surely, 2^68911441808 is an apocalyptic number.

68911441808 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68911441808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77748701499).

68911441808 is an abundant number, since it is smaller than the sum of its proper divisors (86585961190).

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

68911441808 is a wasteful number, since it uses less digits than its factorization.

68911441808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2941 (or 1477 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 50.

The spelling of 68911441808 in words is "sixty-eight billion, nine hundred eleven million, four hundred forty-one thousand, eight hundred eight".