16872556 has 12 divisors (see below), whose sum is σ = 30479680. Its totient is φ = 8164080.

The previous prime is 16872553. The next prime is 16872571. The reversal of 16872556 is 65527861.

It is not an unprimeable number, because it can be changed into a prime (16872553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67911 + ... + 68158.

Almost surely, 2^16872556 is an apocalyptic number.

It is an amenable number.

16872556 is a deficient number, since it is larger than the sum of its proper divisors (13607124).

16872556 is a wasteful number, since it uses less digits than its factorization.

16872556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136104 (or 136102 counting only the distinct ones).

The product of its digits is 100800, while the sum is 40.

The square root of 16872556 is about 4107.6216963104. The cubic root of 16872556 is about 256.4840086445.

The spelling of 16872556 in words is "sixteen million, eight hundred seventy-two thousand, five hundred fifty-six".