16721104671 has 20 divisors (see below), whose sum is σ = 25146099000. Its totient is φ = 11072580336.

The previous prime is 16721104669. The next prime is 16721104703. The reversal of 16721104671 is 17640112761.

16721104671 is a `hidden beast` number, since 16 + 72 + 110 + 467 + 1 = 666.

It is not a de Polignac number, because 16721104671 - 2¹ = 16721104669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16721105671) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 680661 + ... + 704798.

It is an arithmetic number, because the mean of its divisors is an integer number (1257304950).

Almost surely, 2^16721104671 is an apocalyptic number.

16721104671 is a deficient number, since it is larger than the sum of its proper divisors (8424994329).

16721104671 is a wasteful number, since it uses less digits than its factorization.

16721104671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385620 (or 1385611 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The spelling of 16721104671 in words is "sixteen billion, seven hundred twenty-one million, one hundred four thousand, six hundred seventy-one".