16406563 has 2 divisors, whose sum is σ = 16406564. Its totient is φ = 16406562.

The previous prime is 16406501. The next prime is 16406591. The reversal of 16406563 is 36560461.

16406563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16406563 - 2⁹ = 16406051 is a prime.

It is not a weakly prime, because it can be changed into another prime (16406363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8203281 + 8203282.

It is an arithmetic number, because the mean of its divisors is an integer number (8203282).

Almost surely, 2^16406563 is an apocalyptic number.

16406563 is a deficient number, since it is larger than the sum of its proper divisors (1).

16406563 is an equidigital number, since it uses as much as digits as its factorization.

16406563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 16406563 is about 4050.5015738795. The cubic root of 16406563 is about 254.1007051023.

The spelling of 16406563 in words is "sixteen million, four hundred six thousand, five hundred sixty-three".