68333651440 has 80 divisors (see below), whose sum is σ = 159569536896. Its totient is φ = 27214387200.

The previous prime is 68333651413. The next prime is 68333651443. The reversal of 68333651440 is 4415633386.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68333651443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19296070 + ... + 19299610.

Almost surely, 2^68333651440 is an apocalyptic number.

It is an amenable number.

68333651440 is an abundant number, since it is smaller than the sum of its proper divisors (91235885456).

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

68333651440 is a wasteful number, since it uses less digits than its factorization.

68333651440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4538 (or 4532 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 68333651440 in words is "sixty-eight billion, three hundred thirty-three million, six hundred fifty-one thousand, four hundred forty".