68420383380 has 36 divisors (see below), whose sum is σ = 207541830132. Its totient is φ = 18245435520.

The previous prime is 68420383373. The next prime is 68420383397. The reversal of 68420383380 is 8338302486.

68420383380 is a `hidden beast` number, since 68 + 4 + 203 + 8 + 3 + 380 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 31928686596 + 36491696784 = 178686^2 + 191028^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 190056441 + ... + 190056800.

It is an arithmetic number, because the mean of its divisors is an integer number (5765050837).

Almost surely, 2^68420383380 is an apocalyptic number.

68420383380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68420383380 is an abundant number, since it is smaller than the sum of its proper divisors (139121446752).

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

68420383380 is a wasteful number, since it uses less digits than its factorization.

68420383380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380113256 (or 380113251 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The spelling of 68420383380 in words is "sixty-eight billion, four hundred twenty million, three hundred eighty-three thousand, three hundred eighty".