68769616161 has 4 divisors (see below), whose sum is σ = 91692821552. Its totient is φ = 45846410772.

The previous prime is 68769616147. The next prime is 68769616183. The reversal of 68769616161 is 16161696786.

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 not a de Polignac number, because 68769616161 - 2¹⁹ = 68769091873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68769616361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11461602691 + ... + 11461602696.

It is an arithmetic number, because the mean of its divisors is an integer number (22923205388).

Almost surely, 2^68769616161 is an apocalyptic number.

It is an amenable number.

68769616161 is a deficient number, since it is larger than the sum of its proper divisors (22923205391).

68769616161 is a wasteful number, since it uses less digits than its factorization.

68769616161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22923205390.

The product of its digits is 3919104, while the sum is 57.

The spelling of 68769616161 in words is "sixty-eight billion, seven hundred sixty-nine million, six hundred sixteen thousand, one hundred sixty-one".