16671533505 has 16 divisors (see below), whose sum is σ = 29099404224. Its totient is φ = 8083167680.

The previous prime is 16671533491. The next prime is 16671533507. The reversal of 16671533505 is 50533517661.

It is not a de Polignac number, because 16671533505 - 2¹² = 16671529409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16671533507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50519634 + ... + 50519963.

It is an arithmetic number, because the mean of its divisors is an integer number (1818712764).

Almost surely, 2^16671533505 is an apocalyptic number.

16671533505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16671533505 is a deficient number, since it is larger than the sum of its proper divisors (12427870719).

16671533505 is a wasteful number, since it uses less digits than its factorization.

16671533505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101039616.

The product of its (nonzero) digits is 283500, while the sum is 42.

The spelling of 16671533505 in words is "sixteen billion, six hundred seventy-one million, five hundred thirty-three thousand, five hundred five".