689123081015 has 8 divisors (see below), whose sum is σ = 826956579840. Its totient is φ = 551292543072.

The previous prime is 689123080879. The next prime is 689123081041. The reversal of 689123081015 is 510180321986.

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 689123081015 - 2²² = 689118886711 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191159 + ... + 1189448.

It is an arithmetic number, because the mean of its divisors is an integer number (103369572480).

Almost surely, 2^689123081015 is an apocalyptic number.

689123081015 is a deficient number, since it is larger than the sum of its proper divisors (137833498825).

689123081015 is a wasteful number, since it uses less digits than its factorization.

689123081015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1480441.

The product of its (nonzero) digits is 103680, while the sum is 44.

The spelling of 689123081015 in words is "six hundred eighty-nine billion, one hundred twenty-three million, eighty-one thousand, fifteen".