16556021545004 has 12 divisors (see below), whose sum is σ = 28973370943104. Its totient is φ = 8277915561264.

The previous prime is 16556021544973. The next prime is 16556021545039. The reversal of 16556021545004 is 40054512065561.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23410847 + ... + 24107670.

It is an arithmetic number, because the mean of its divisors is an integer number (2414447578592).

Almost surely, 2^{16556021545004} is an apocalyptic number.

It is an amenable number.

16556021545004 is a deficient number, since it is larger than the sum of its proper divisors (12417349398100).

16556021545004 is a wasteful number, since it uses less digits than its factorization.

16556021545004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47605624 (or 47605622 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 44.

The spelling of 16556021545004 in words is "sixteen trillion, five hundred fifty-six billion, twenty-one million, five hundred forty-five thousand, four".