689841018129 has 16 divisors (see below), whose sum is σ = 922961221952. Its totient is φ = 458307989568.

The previous prime is 689841018109. The next prime is 689841018143. The reversal of 689841018129 is 921810148986.

It is not a de Polignac number, because 689841018129 - 2⁷ = 689841018001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689841018109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4916187 + ... + 5054559.

It is an arithmetic number, because the mean of its divisors is an integer number (57685076372).

Almost surely, 2^689841018129 is an apocalyptic number.

It is an amenable number.

689841018129 is a deficient number, since it is larger than the sum of its proper divisors (233120203823).

689841018129 is a wasteful number, since it uses less digits than its factorization.

689841018129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144096.

The product of its (nonzero) digits is 1990656, while the sum is 57.

The spelling of 689841018129 in words is "six hundred eighty-nine billion, eight hundred forty-one million, eighteen thousand, one hundred twenty-nine".