16555272274045 has 4 divisors (see below), whose sum is σ = 19866326728860. Its totient is φ = 13244217819232.

The previous prime is 16555272274001. The next prime is 16555272274213. The reversal of 16555272274045 is 54047227255561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8748450697284 + 7806821576761 = 2957778^2 + 2794069^2 .

It is a cyclic number.

It is not a de Polignac number, because 16555272274045 - 2²³ = 16555263885437 is a prime.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1655527227400 + ... + 1655527227409.

It is an arithmetic number, because the mean of its divisors is an integer number (4966581682215).

Almost surely, 2^{16555272274045} is an apocalyptic number.

It is an amenable number.

16555272274045 is a deficient number, since it is larger than the sum of its proper divisors (3311054454815).

16555272274045 is an equidigital number, since it uses as much as digits as its factorization.

16555272274045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3311054454814.

The product of its (nonzero) digits is 23520000, while the sum is 55.

The spelling of 16555272274045 in words is "sixteen trillion, five hundred fifty-five billion, two hundred seventy-two million, two hundred seventy-four thousand, forty-five".