16431504513 has 72 divisors (see below), whose sum is σ = 25107668352. Its totient is φ = 9550960128.

The previous prime is 16431504499. The next prime is 16431504517. The reversal of 16431504513 is 31540513461.

It is a happy number.

16431504513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16431504513 - 2¹⁰ = 16431503489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16431504517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 14709831 + ... + 14710947.

It is an arithmetic number, because the mean of its divisors is an integer number (348717616).

Almost surely, 2^16431504513 is an apocalyptic number.

It is an amenable number.

16431504513 is a deficient number, since it is larger than the sum of its proper divisors (8676163839).

16431504513 is a wasteful number, since it uses less digits than its factorization.

16431504513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239 (or 1203 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The spelling of 16431504513 in words is "sixteen billion, four hundred thirty-one million, five hundred four thousand, five hundred thirteen".