68716665555944 has 64 divisors (see below), whose sum is σ = 153676299651840. Its totient is φ = 28165141255680.

The previous prime is 68716665555943. The next prime is 68716665555961. The reversal of 68716665555944 is 44955556661786.

It is a super-2 number, since 2×68716665555944² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68716665555943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4022684 + ... + 12394164.

It is an arithmetic number, because the mean of its divisors is an integer number (2401192182060).

Almost surely, 2^{68716665555944} is an apocalyptic number.

It is an amenable number.

68716665555944 is an abundant number, since it is smaller than the sum of its proper divisors (84959634095896).

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

68716665555944 is a wasteful number, since it uses less digits than its factorization.

68716665555944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8377890 (or 8377886 counting only the distinct ones).

The product of its digits is 6531840000, while the sum is 77.

The spelling of 68716665555944 in words is "sixty-eight trillion, seven hundred sixteen billion, six hundred sixty-five million, five hundred fifty-five thousand, nine hundred forty-four".