16438186963 has 16 divisors (see below), whose sum is σ = 19065321216. Its totient is φ = 14024364640.

The previous prime is 16438186901. The next prime is 16438186991. The reversal of 16438186963 is 36968183461.

It is a de Polignac number, because none of the positive numbers 2^k-16438186963 is a prime.

It is a super-3 number, since 3×16438186963³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16438186993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 599545 + ... + 626362.

It is an arithmetic number, because the mean of its divisors is an integer number (1191582576).

Almost surely, 2^16438186963 is an apocalyptic number.

16438186963 is a deficient number, since it is larger than the sum of its proper divisors (2627134253).

16438186963 is a wasteful number, since it uses less digits than its factorization.

16438186963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225994.

The product of its digits is 4478976, while the sum is 55.

It can be divided in two parts, 16438 and 186963, that added together give a square (203401 = 451²).

The spelling of 16438186963 in words is "sixteen billion, four hundred thirty-eight million, one hundred eighty-six thousand, nine hundred sixty-three".