68404040380 has 96 divisors (see below), whose sum is σ = 155533996800. Its totient is φ = 25120862208.

The previous prime is 68404040351. The next prime is 68404040381. The reversal of 68404040380 is 8304040486.

It is a super-2 number, since 2×68404040380² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68404040381) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65835901 + ... + 65836939.

It is an arithmetic number, because the mean of its divisors is an integer number (1620145800).

Almost surely, 2^68404040380 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68404040380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77766998400).

68404040380 is an abundant number, since it is smaller than the sum of its proper divisors (87129956420).

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

68404040380 is a wasteful number, since it uses less digits than its factorization.

68404040380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2183 (or 2181 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 37.

The spelling of 68404040380 in words is "sixty-eight billion, four hundred four million, forty thousand, three hundred eighty".