16516378915263 has 12 divisors (see below), whose sum is σ = 23873343390520. Its totient is φ = 11003372373456.

The previous prime is 16516378915243. The next prime is 16516378915271. The reversal of 16516378915263 is 36251987361561.

16516378915263 is a `hidden beast` number, since 1 + 6 + 5 + 16 + 3 + 7 + 8 + 91 + 526 + 3 = 666.

It is not a de Polignac number, because 16516378915263 - 2¹⁰ = 16516378914239 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16516378915263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16516378915243) 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, 628894756 + ... + 628921017.

Almost surely, 2^{16516378915263} is an apocalyptic number.

16516378915263 is a deficient number, since it is larger than the sum of its proper divisors (7356964475257).

16516378915263 is a wasteful number, since it uses less digits than its factorization.

16516378915263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257817238 (or 1257817235 counting only the distinct ones).

The product of its digits is 48988800, while the sum is 63.

The spelling of 16516378915263 in words is "sixteen trillion, five hundred sixteen billion, three hundred seventy-eight million, nine hundred fifteen thousand, two hundred sixty-three".