16840628345 has 8 divisors (see below), whose sum is σ = 20209460040. Its totient is φ = 13472032000.

The previous prime is 16840628341. The next prime is 16840628381. The reversal of 16840628345 is 54382604861.

It can be written as a sum of positive squares in 4 ways, for example, as 176916601 + 16663711744 = 13301^2 + 129088^2 .

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

It is not a de Polignac number, because 16840628345 - 2² = 16840628341 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16840628345.

It is not an unprimeable number, because it can be changed into a prime (16840628341) 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, 211595 + ... + 280095.

It is an arithmetic number, because the mean of its divisors is an integer number (2526182505).

Almost surely, 2^16840628345 is an apocalyptic number.

It is an amenable number.

16840628345 is a deficient number, since it is larger than the sum of its proper divisors (3368831695).

16840628345 is an equidigital number, since it uses as much as digits as its factorization.

16840628345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117675.

The product of its (nonzero) digits is 1105920, while the sum is 47.

The spelling of 16840628345 in words is "sixteen billion, eight hundred forty million, six hundred twenty-eight thousand, three hundred forty-five".