16645576988 has 6 divisors (see below), whose sum is σ = 29129759736. Its totient is φ = 8322788492.

The previous prime is 16645576973. The next prime is 16645577017. The reversal of 16645576988 is 88967554661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2080697120 + ... + 2080697127.

It is an arithmetic number, because the mean of its divisors is an integer number (4854959956).

Almost surely, 2^16645576988 is an apocalyptic number.

It is an amenable number.

16645576988 is a deficient number, since it is larger than the sum of its proper divisors (12484182748).

16645576988 is a wasteful number, since it uses less digits than its factorization.

16645576988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4161394251 (or 4161394249 counting only the distinct ones).

The product of its digits is 87091200, while the sum is 65.

The spelling of 16645576988 in words is "sixteen billion, six hundred forty-five million, five hundred seventy-six thousand, nine hundred eighty-eight".