68064556881 has 8 divisors (see below), whose sum is σ = 95529202720. Its totient is φ = 42988141152.

The previous prime is 68064556849. The next prime is 68064556897. The reversal of 68064556881 is 18865546086.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68064556881 - 2⁵ = 68064556849 is a prime.

It is a super-2 number, since 2×68064556881² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57), and also a Moran number because the ratio is a prime number: 1194115033 = 68064556881 / (6 + 8 + 0 + 6 + 4 + 5 + 5 + 6 + 8 + 8 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68064556801) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 597057460 + ... + 597057573.

It is an arithmetic number, because the mean of its divisors is an integer number (11941150340).

Almost surely, 2^68064556881 is an apocalyptic number.

It is an amenable number.

68064556881 is a deficient number, since it is larger than the sum of its proper divisors (27464645839).

68064556881 is a wasteful number, since it uses less digits than its factorization.

68064556881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1194115055.

The product of its (nonzero) digits is 11059200, while the sum is 57.

The spelling of 68064556881 in words is "sixty-eight billion, sixty-four million, five hundred fifty-six thousand, eight hundred eighty-one".