16404136040 has 16 divisors (see below), whose sum is σ = 36909306180. Its totient is φ = 6561654400.

The previous prime is 16404135997. The next prime is 16404136057. The reversal of 16404136040 is 4063140461.

It can be written as a sum of positive squares in 2 ways, for example, as 14773430116 + 1630705924 = 121546^2 + 40382^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16404135994 and 16404136012.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205051661 + ... + 205051740.

Almost surely, 2^16404136040 is an apocalyptic number.

16404136040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16404136040 is an abundant number, since it is smaller than the sum of its proper divisors (20505170140).

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

16404136040 is a wasteful number, since it uses less digits than its factorization.

16404136040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410103412 (or 410103408 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The spelling of 16404136040 in words is "sixteen billion, four hundred four million, one hundred thirty-six thousand, forty".