11516643 has 6 divisors (see below), whose sum is σ = 16635164. Its totient is φ = 7677756.

The previous prime is 11516581. The next prime is 11516663. The reversal of 11516643 is 34661511.

11516643 is a `hidden beast` number, since 1 + 1 + 5 + 16 + 643 = 666.

It is not a de Polignac number, because 11516643 - 2⁶ = 11516579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11516663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 639805 + ... + 639822.

Almost surely, 2^11516643 is an apocalyptic number.

11516643 is a deficient number, since it is larger than the sum of its proper divisors (5118521).

11516643 is a wasteful number, since it uses less digits than its factorization.

11516643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279633 (or 1279630 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 11516643 is about 3393.6179808576. The cubic root of 11516643 is about 225.8267068977.

The spelling of 11516643 in words is "eleven million, five hundred sixteen thousand, six hundred forty-three".