68889403489 has 4 divisors (see below), whose sum is σ = 68890023856. Its totient is φ = 68888783124.

The previous prime is 68889403469. The next prime is 68889403543. The reversal of 68889403489 is 98430498886.

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 68889403489 - 2¹³ = 68889395297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68889403409) 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, 92859 + ... + 382624.

It is an arithmetic number, because the mean of its divisors is an integer number (17222505964).

Almost surely, 2^68889403489 is an apocalyptic number.

It is an amenable number.

68889403489 is a deficient number, since it is larger than the sum of its proper divisors (620367).

68889403489 is a wasteful number, since it uses less digits than its factorization.

68889403489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620366.

The product of its (nonzero) digits is 95551488, while the sum is 67.

The spelling of 68889403489 in words is "sixty-eight billion, eight hundred eighty-nine million, four hundred three thousand, four hundred eighty-nine".