16780563 has 6 divisors (see below), whose sum is σ = 24238604. Its totient is φ = 11187036.

The previous prime is 16780541. The next prime is 16780567. The reversal of 16780563 is 36508761.

16780563 is a `hidden beast` number, since 16 + 7 + 80 + 563 = 666.

It is not a de Polignac number, because 16780563 - 2⁹ = 16780051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16780567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 932245 + ... + 932262.

Almost surely, 2^16780563 is an apocalyptic number.

16780563 is a deficient number, since it is larger than the sum of its proper divisors (7458041).

16780563 is a wasteful number, since it uses less digits than its factorization.

16780563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1864513 (or 1864510 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 16780563 is about 4096.4085489609. The cubic root of 16780563 is about 256.0170225904.

The spelling of 16780563 in words is "sixteen million, seven hundred eighty thousand, five hundred sixty-three".