16464431605 has 8 divisors (see below), whose sum is σ = 19758432672. Its totient is φ = 13170802128.

The previous prime is 16464431603. The next prime is 16464431611. The reversal of 16464431605 is 50613446461.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16464431605 - 2¹ = 16464431603 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16464431603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16242 + ... + 182188.

It is an arithmetic number, because the mean of its divisors is an integer number (2469804084).

Almost surely, 2^16464431605 is an apocalyptic number.

It is an amenable number.

16464431605 is a deficient number, since it is larger than the sum of its proper divisors (3294001067).

16464431605 is a wasteful number, since it uses less digits than its factorization.

16464431605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185795.

The product of its (nonzero) digits is 207360, while the sum is 40.

It can be divided in two parts, 164644 and 31605, that added together give a square (196249 = 443²).

The spelling of 16464431605 in words is "sixteen billion, four hundred sixty-four million, four hundred thirty-one thousand, six hundred five".