16701720172 has 6 divisors (see below), whose sum is σ = 29228010308. Its totient is φ = 8350860084.

The previous prime is 16701720163. The next prime is 16701720173. The reversal of 16701720172 is 27102710761.

It is not an unprimeable number, because it can be changed into a prime (16701720173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2087715018 + ... + 2087715025.

Almost surely, 2^16701720172 is an apocalyptic number.

It is an amenable number.

16701720172 is a deficient number, since it is larger than the sum of its proper divisors (12526290136).

16701720172 is a wasteful number, since it uses less digits than its factorization.

16701720172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4175430047 (or 4175430045 counting only the distinct ones).

The product of its (nonzero) digits is 8232, while the sum is 34.

The spelling of 16701720172 in words is "sixteen billion, seven hundred one million, seven hundred twenty thousand, one hundred seventy-two".