16655015506561 has 8 divisors (see below), whose sum is σ = 16913414952000. Its totient is φ = 16397277776880.

The previous prime is 16655015506553. The next prime is 16655015506583. The reversal of 16655015506561 is 16560551055661.

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 16655015506561 - 2³ = 16655015506553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16655015506499 and 16655015506508.

It is not an unprimeable number, because it can be changed into a prime (16655015506511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165378211 + ... + 165478888.

It is an arithmetic number, because the mean of its divisors is an integer number (2114176869000).

Almost surely, 2^{16655015506561} is an apocalyptic number.

It is an amenable number.

16655015506561 is a deficient number, since it is larger than the sum of its proper divisors (258399445439).

16655015506561 is an equidigital number, since it uses as much as digits as its factorization.

16655015506561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330857879.

The product of its (nonzero) digits is 4050000, while the sum is 52.

The spelling of 16655015506561 in words is "sixteen trillion, six hundred fifty-five billion, fifteen million, five hundred six thousand, five hundred sixty-one".