16012923505 has 4 divisors (see below), whose sum is σ = 19215508212. Its totient is φ = 12810338800.

The previous prime is 16012923499. The next prime is 16012923527. The reversal of 16012923505 is 50532921061.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9453867361 + 6559056144 = 97231^2 + 80988^2 .

It is not a de Polignac number, because 16012923505 - 2²¹ = 16010826353 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1601292346 + ... + 1601292355.

It is an arithmetic number, because the mean of its divisors is an integer number (4803877053).

Almost surely, 2^16012923505 is an apocalyptic number.

It is an amenable number.

16012923505 is a deficient number, since it is larger than the sum of its proper divisors (3202584707).

16012923505 is an equidigital number, since it uses as much as digits as its factorization.

16012923505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3202584706.

The product of its (nonzero) digits is 16200, while the sum is 34.

The spelling of 16012923505 in words is "sixteen billion, twelve million, nine hundred twenty-three thousand, five hundred five".