67718998228 has 72 divisors (see below), whose sum is σ = 146097824040. Its totient is φ = 27290511360.

The previous prime is 67718998169. The next prime is 67718998261. The reversal of 67718998228 is 82289981776.

It can be written as a sum of positive squares in 4 ways, for example, as 32404320144 + 35314678084 = 180012^2 + 187922^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3926488 + ... + 3943696.

It is an arithmetic number, because the mean of its divisors is an integer number (2029136445).

Almost surely, 2^67718998228 is an apocalyptic number.

67718998228 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 67718998228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73048912020).

67718998228 is an abundant number, since it is smaller than the sum of its proper divisors (78378825812).

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

67718998228 is a wasteful number, since it uses less digits than its factorization.

67718998228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18425 (or 18416 counting only the distinct ones).

The product of its digits is 48771072, while the sum is 67.

The spelling of 67718998228 in words is "sixty-seven billion, seven hundred eighteen million, nine hundred ninety-eight thousand, two hundred twenty-eight".