2161712060555 has 4 divisors (see below), whose sum is σ = 2594054472672. Its totient is φ = 1729369648440.

The previous prime is 2161712060537. The next prime is 2161712060567. The reversal of 2161712060555 is 5550602171612.

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

It is not a de Polignac number, because 2161712060555 - 2¹⁰ = 2161712059531 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 216171206051 + ... + 216171206060.

It is an arithmetic number, because the mean of its divisors is an integer number (648513618168).

Almost surely, 2^{2161712060555} is an apocalyptic number.

2161712060555 is a deficient number, since it is larger than the sum of its proper divisors (432342412117).

2161712060555 is an equidigital number, since it uses as much as digits as its factorization.

2161712060555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432342412116.

The product of its (nonzero) digits is 126000, while the sum is 41.

The spelling of 2161712060555 in words is "two trillion, one hundred sixty-one billion, seven hundred twelve million, sixty thousand, five hundred fifty-five".