16405503012 has 36 divisors (see below), whose sum is σ = 41474125056. Its totient is φ = 5467886640.

The previous prime is 16405503011. The next prime is 16405503019. The reversal of 16405503012 is 21030550461.

16405503012 is a `hidden beast` number, since 1 + 640 + 5 + 5 + 0 + 3 + 0 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (16405503011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 393093 + ... + 432819.

Almost surely, 2^16405503012 is an apocalyptic number.

16405503012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16405503012 is an abundant number, since it is smaller than the sum of its proper divisors (25068622044).

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

16405503012 is a wasteful number, since it uses less digits than its factorization.

16405503012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51208 (or 51203 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 16405503012 in words is "sixteen billion, four hundred five million, five hundred three thousand, twelve".