16491974858 has 8 divisors (see below), whose sum is σ = 24739047840. Its totient is φ = 8245625580.

The previous prime is 16491974831. The next prime is 16491974867. The reversal of 16491974858 is 85847919461.

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

It is a self number, because there is not a number n which added to its sum of digits gives 16491974858.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119828 + ... + 217583.

It is an arithmetic number, because the mean of its divisors is an integer number (3092380980).

Almost surely, 2^16491974858 is an apocalyptic number.

16491974858 is a deficient number, since it is larger than the sum of its proper divisors (8247072982).

16491974858 is a wasteful number, since it uses less digits than its factorization.

16491974858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361852.

The product of its digits is 17418240, while the sum is 62.

The spelling of 16491974858 in words is "sixteen billion, four hundred ninety-one million, nine hundred seventy-four thousand, eight hundred fifty-eight".