68382287640 has 128 divisors (see below), whose sum is σ = 227999116800. Its totient is φ = 18230624640.

The previous prime is 68382287639. The next prime is 68382287731. The reversal of 68382287640 is 4678228386.

It is a super-2 number, since 2×68382287640² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7221549 + ... + 7231011.

It is an arithmetic number, because the mean of its divisors is an integer number (1781243100).

Almost surely, 2^68382287640 is an apocalyptic number.

68382287640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68382287640 is an abundant number, since it is smaller than the sum of its proper divisors (159616829160).

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

68382287640 is a wasteful number, since it uses less digits than its factorization.

68382287640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16174 (or 16164 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 54.

The spelling of 68382287640 in words is "sixty-eight billion, three hundred eighty-two million, two hundred eighty-seven thousand, six hundred forty".