68202665081 has 4 divisors (see below), whose sum is σ = 68276880000. Its totient is φ = 68128450164.

The previous prime is 68202665077. The next prime is 68202665159. The reversal of 68202665081 is 18056620286.

68202665081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68202665081 - 2² = 68202665077 is a prime.

It is a super-2 number, since 2×68202665081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68202665021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37106081 + ... + 37107918.

It is an arithmetic number, because the mean of its divisors is an integer number (17069220000).

Almost surely, 2^68202665081 is an apocalyptic number.

It is an amenable number.

68202665081 is a deficient number, since it is larger than the sum of its proper divisors (74214919).

68202665081 is an equidigital number, since it uses as much as digits as its factorization.

68202665081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74214918.

The product of its (nonzero) digits is 276480, while the sum is 44.

The spelling of 68202665081 in words is "sixty-eight billion, two hundred two million, six hundred sixty-five thousand, eighty-one".