689628190845 has 32 divisors (see below), whose sum is σ = 1213192765440. Its totient is φ = 331732376640.

The previous prime is 689628190841. The next prime is 689628190913. The reversal of 689628190845 is 548091826986.

It is not a de Polignac number, because 689628190845 - 2² = 689628190841 is a prime.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689628190841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16434025 + ... + 16475934.

It is an arithmetic number, because the mean of its divisors is an integer number (37912273920).

Almost surely, 2^689628190845 is an apocalyptic number.

It is an amenable number.

689628190845 is a deficient number, since it is larger than the sum of its proper divisors (523564574595).

689628190845 is a wasteful number, since it uses less digits than its factorization.

689628190845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32910105.

The product of its (nonzero) digits is 59719680, while the sum is 66.

The spelling of 689628190845 in words is "six hundred eighty-nine billion, six hundred twenty-eight million, one hundred ninety thousand, eight hundred forty-five".