16721071074686 has 48 divisors (see below), whose sum is σ = 29935972191600. Its totient is φ = 6922644422400.

The previous prime is 16721071074667. The next prime is 16721071074689. The reversal of 16721071074686 is 68647017012761.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16721071074689) 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, 22902161 + ... + 23620988.

It is an arithmetic number, because the mean of its divisors is an integer number (623666087325).

Almost surely, 2^{16721071074686} is an apocalyptic number.

16721071074686 is a deficient number, since it is larger than the sum of its proper divisors (13214901116914).

16721071074686 is a wasteful number, since it uses less digits than its factorization.

16721071074686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46523241 (or 46523210 counting only the distinct ones).

The product of its (nonzero) digits is 4741632, while the sum is 56.

The spelling of 16721071074686 in words is "sixteen trillion, seven hundred twenty-one billion, seventy-one million, seventy-four thousand, six hundred eighty-six".