689729828499 has 24 divisors (see below), whose sum is σ = 1094308200960. Its totient is φ = 416678887152.

The previous prime is 689729828479. The next prime is 689729828507. The reversal of 689729828499 is 994828927986.

689729828499 is a `hidden beast` number, since 6 + 89 + 7 + 29 + 8 + 28 + 499 = 666.

689729828499 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 689729828499 - 2⁷ = 689729828371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (689729828479) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87681019 + ... + 87688884.

It is an arithmetic number, because the mean of its divisors is an integer number (45596175040).

Almost surely, 2^689729828499 is an apocalyptic number.

689729828499 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

689729828499 is a deficient number, since it is larger than the sum of its proper divisors (404578372461).

689729828499 is a wasteful number, since it uses less digits than its factorization.

689729828499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175369951 (or 175369948 counting only the distinct ones).

The product of its digits is 2257403904, while the sum is 81.

The spelling of 689729828499 in words is "six hundred eighty-nine billion, seven hundred twenty-nine million, eight hundred twenty-eight thousand, four hundred ninety-nine".