68569381889 has 4 divisors (see below), whose sum is σ = 68569952256. Its totient is φ = 68568811524.

The previous prime is 68569381849. The next prime is 68569381897. The reversal of 68569381889 is 98818396586.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 68569381889 - 2⁸ = 68569381633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68569381819) 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, 26849 + ... + 371294.

It is an arithmetic number, because the mean of its divisors is an integer number (17142488064).

Almost surely, 2^68569381889 is an apocalyptic number.

It is an amenable number.

68569381889 is a deficient number, since it is larger than the sum of its proper divisors (570367).

68569381889 is a wasteful number, since it uses less digits than its factorization.

68569381889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570366.

The product of its digits is 179159040, while the sum is 71.

The spelling of 68569381889 in words is "sixty-eight billion, five hundred sixty-nine million, three hundred eighty-one thousand, eight hundred eighty-nine".