16405323604 has 24 divisors (see below), whose sum is σ = 29679388200. Its totient is φ = 7929169920.

The previous prime is 16405323601. The next prime is 16405323611. The reversal of 16405323604 is 40632350461.

It can be written as a sum of positive squares in 4 ways, for example, as 8008900 + 16397314704 = 2830^2 + 128052^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16405323604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16405323601) 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, 440989 + ... + 476740.

It is an arithmetic number, because the mean of its divisors is an integer number (1236641175).

Almost surely, 2^16405323604 is an apocalyptic number.

It is an amenable number.

16405323604 is a deficient number, since it is larger than the sum of its proper divisors (13274064596).

16405323604 is a wasteful number, since it uses less digits than its factorization.

16405323604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917883 (or 917881 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

The spelling of 16405323604 in words is "sixteen billion, four hundred five million, three hundred twenty-three thousand, six hundred four".