16004104040 has 16 divisors (see below), whose sum is σ = 36009234180. Its totient is φ = 6401641600.

The previous prime is 16004104037. The next prime is 16004104049. The reversal of 16004104040 is 4040140061.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15854335396 + 149768644 = 125914^2 + 12238^2 .

It is a super-2 number, since 2×16004104040² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (16004104049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200051261 + ... + 200051340.

Almost surely, 2^16004104040 is an apocalyptic number.

16004104040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16004104040 is an abundant number, since it is smaller than the sum of its proper divisors (20005130140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16004104040 is a wasteful number, since it uses less digits than its factorization.

16004104040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400102612 (or 400102608 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The spelling of 16004104040 in words is "sixteen billion, four million, one hundred four thousand, forty".