2105550505563 has 16 divisors (see below), whose sum is σ = 2907057772800. Its totient is φ = 1353966793760.

The previous prime is 2105550505517. The next prime is 2105550505579. The reversal of 2105550505563 is 3655050555012.

It is a cyclic number.

It is not a de Polignac number, because 2105550505563 - 2¹⁴ = 2105550489179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2105550505063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11786583 + ... + 11963888.

It is an arithmetic number, because the mean of its divisors is an integer number (181691110800).

Almost surely, 2^{2105550505563} is an apocalyptic number.

2105550505563 is a deficient number, since it is larger than the sum of its proper divisors (801507267237).

2105550505563 is a wasteful number, since it uses less digits than its factorization.

2105550505563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23751522.

The product of its (nonzero) digits is 562500, while the sum is 42.

The spelling of 2105550505563 in words is "two trillion, one hundred five billion, five hundred fifty million, five hundred five thousand, five hundred sixty-three".