16645143065604 has 24 divisors (see below), whose sum is σ = 38981983275648. Its totient is φ = 5527907290080.

The previous prime is 16645143065587. The next prime is 16645143065671. The reversal of 16645143065604 is 40656034154661.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2559213087 + ... + 2559219590.

It is an arithmetic number, because the mean of its divisors is an integer number (1624249303152).

Almost surely, 2^{16645143065604} is an apocalyptic number.

It is an amenable number.

16645143065604 is an abundant number, since it is smaller than the sum of its proper divisors (22336840210044).

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

16645143065604 is a wasteful number, since it uses less digits than its factorization.

16645143065604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5118432955 (or 5118432953 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 51.

The spelling of 16645143065604 in words is "sixteen trillion, six hundred forty-five billion, one hundred forty-three million, sixty-five thousand, six hundred four".