689110181021 has 8 divisors (see below), whose sum is σ = 696143710080. Its totient is φ = 682083250992.

The previous prime is 689110181003. The next prime is 689110181057. The reversal of 689110181021 is 120181011986.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 689110181021 - 2³⁰ = 688036439197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689110181521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1439705 + ... + 1857678.

It is an arithmetic number, because the mean of its divisors is an integer number (87017963760).

Almost surely, 2^689110181021 is an apocalyptic number.

It is an amenable number.

689110181021 is a deficient number, since it is larger than the sum of its proper divisors (7033529059).

689110181021 is a wasteful number, since it uses less digits than its factorization.

689110181021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3299515.

The product of its (nonzero) digits is 6912, while the sum is 38.

The spelling of 689110181021 in words is "six hundred eighty-nine billion, one hundred ten million, one hundred eighty-one thousand, twenty-one".