16136643 has 8 divisors (see below), whose sum is σ = 22648000. Its totient is φ = 10191528.

The previous prime is 16136633. The next prime is 16136663. The reversal of 16136643 is 34663161.

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

It is not a de Polignac number, because 16136643 - 2⁶ = 16136579 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16136643.

It is not an unprimeable number, because it can be changed into a prime (16136633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141493 + ... + 141606.

It is an arithmetic number, because the mean of its divisors is an integer number (2831000).

Almost surely, 2^16136643 is an apocalyptic number.

16136643 is a deficient number, since it is larger than the sum of its proper divisors (6511357).

16136643 is a wasteful number, since it uses less digits than its factorization.

16136643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283121.

The product of its digits is 7776, while the sum is 30.

The square root of 16136643 is about 4017.0440624917. The cubic root of 16136643 is about 252.6995083663.

It can be divided in two parts, 1613 and 6643, that added together give a triangular number (8256 = T₁₂₈).

The spelling of 16136643 in words is "sixteen million, one hundred thirty-six thousand, six hundred forty-three".