16645576987 has 8 divisors (see below), whose sum is σ = 17977374800. Its totient is φ = 15321117600.

The previous prime is 16645576973. The next prime is 16645577017. The reversal of 16645576987 is 78967554661.

16645576987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16645576987 - 2¹⁵ = 16645544219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16645576907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1829889 + ... + 1838962.

It is an arithmetic number, because the mean of its divisors is an integer number (2247171850).

Almost surely, 2^16645576987 is an apocalyptic number.

16645576987 is a deficient number, since it is larger than the sum of its proper divisors (1331797813).

16645576987 is a wasteful number, since it uses less digits than its factorization.

16645576987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3669213.

The product of its digits is 76204800, while the sum is 64.

The spelling of 16645576987 in words is "sixteen billion, six hundred forty-five million, five hundred seventy-six thousand, nine hundred eighty-seven".