16780438863 has 12 divisors (see below), whose sum is σ = 25664200848. Its totient is φ = 10528902720.

The previous prime is 16780438853. The next prime is 16780438879. The reversal of 16780438863 is 36883408761.

It is not a de Polignac number, because 16780438863 - 2⁸ = 16780438607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16780438813) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54837883 + ... + 54838188.

It is an arithmetic number, because the mean of its divisors is an integer number (2138683404).

Almost surely, 2^16780438863 is an apocalyptic number.

16780438863 is a deficient number, since it is larger than the sum of its proper divisors (8883761985).

16780438863 is a wasteful number, since it uses less digits than its factorization.

16780438863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109676094 (or 109676091 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 16780438863 in words is "sixteen billion, seven hundred eighty million, four hundred thirty-eight thousand, eight hundred sixty-three".