16556701456655 has 16 divisors (see below), whose sum is σ = 20280415881024. Its totient is φ = 12972308916480.

The previous prime is 16556701456609. The next prime is 16556701456657. The reversal of 16556701456655 is 55665410765561.

It is not a de Polignac number, because 16556701456655 - 2³⁰ = 16555627714831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16556701456657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116418779 + ... + 116560908.

It is an arithmetic number, because the mean of its divisors is an integer number (1267525992564).

Almost surely, 2^{16556701456655} is an apocalyptic number.

16556701456655 is a deficient number, since it is larger than the sum of its proper divisors (3723714424369).

16556701456655 is a wasteful number, since it uses less digits than its factorization.

16556701456655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232979986.

The product of its (nonzero) digits is 113400000, while the sum is 62.

The spelling of 16556701456655 in words is "sixteen trillion, five hundred fifty-six billion, seven hundred one million, four hundred fifty-six thousand, six hundred fifty-five".