2155532305555 has 4 divisors (see below), whose sum is σ = 2586638766672. Its totient is φ = 1724425844440.

The previous prime is 2155532305529. The next prime is 2155532305573. The reversal of 2155532305555 is 5555032355512.

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

It is not a de Polignac number, because 2155532305555 - 2⁷ = 2155532305427 is a prime.

It is a Duffinian number.

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, 215553230551 + ... + 215553230560.

It is an arithmetic number, because the mean of its divisors is an integer number (646659691668).

Almost surely, 2^{2155532305555} is an apocalyptic number.

2155532305555 is a deficient number, since it is larger than the sum of its proper divisors (431106461117).

2155532305555 is an equidigital number, since it uses as much as digits as its factorization.

2155532305555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431106461116.

The product of its (nonzero) digits is 2812500, while the sum is 46.

The spelling of 2155532305555 in words is "two trillion, one hundred fifty-five billion, five hundred thirty-two million, three hundred five thousand, five hundred fifty-five".