68872289789 has 4 divisors (see below), whose sum is σ = 68872832700. Its totient is φ = 68871746880.

The previous prime is 68872289767. The next prime is 68872289797. The reversal of 68872289789 is 98798227886.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 51327168025 + 17545121764 = 226555^2 + 132458^2 .

It is a cyclic number.

It is not a de Polignac number, because 68872289789 - 2³⁶ = 152813053 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68872289989) 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, 31637 + ... + 372485.

It is an arithmetic number, because the mean of its divisors is an integer number (17218208175).

Almost surely, 2^68872289789 is an apocalyptic number.

It is an amenable number.

68872289789 is a deficient number, since it is larger than the sum of its proper divisors (542911).

68872289789 is a wasteful number, since it uses less digits than its factorization.

68872289789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542910.

The product of its digits is 390168576, while the sum is 74.

The spelling of 68872289789 in words is "sixty-eight billion, eight hundred seventy-two million, two hundred eighty-nine thousand, seven hundred eighty-nine".