16005567172 has 18 divisors (see below), whose sum is σ = 32582762142. Its totient is φ = 6859528704.

The previous prime is 16005567143. The next prime is 16005567173. The reversal of 16005567172 is 27176550061.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 10875569796 + 5129997376 = 104286^2 + 71624^2 .

It is not an unprimeable number, because it can be changed into a prime (16005567173) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40830333 + ... + 40830724.

Almost surely, 2^16005567172 is an apocalyptic number.

It is an amenable number.

16005567172 is an abundant number, since it is smaller than the sum of its proper divisors (16577194970).

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

16005567172 is a wasteful number, since it uses less digits than its factorization.

16005567172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81661075 (or 81661066 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 40.

The spelling of 16005567172 in words is "sixteen billion, five million, five hundred sixty-seven thousand, one hundred seventy-two".