68233935881 has 4 divisors (see below), whose sum is σ = 68234869764. Its totient is φ = 68233002000.

The previous prime is 68233935821. The next prime is 68233935883. The reversal of 68233935881 is 18853933286.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35176878025 + 33057057856 = 187555^2 + 181816^2 .

It is a cyclic number.

It is not a de Polignac number, because 68233935881 - 2¹⁴ = 68233919497 is a prime.

It is a super-2 number, since 2×68233935881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68233935883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347090 + ... + 506891.

It is an arithmetic number, because the mean of its divisors is an integer number (17058717441).

Almost surely, 2^68233935881 is an apocalyptic number.

It is an amenable number.

68233935881 is a deficient number, since it is larger than the sum of its proper divisors (933883).

68233935881 is an equidigital number, since it uses as much as digits as its factorization.

68233935881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933882.

The product of its digits is 7464960, while the sum is 56.

The spelling of 68233935881 in words is "sixty-eight billion, two hundred thirty-three million, nine hundred thirty-five thousand, eight hundred eighty-one".