2105635655 has 4 divisors (see below), whose sum is σ = 2526762792. Its totient is φ = 1684508520.

The previous prime is 2105635639. The next prime is 2105635669. The reversal of 2105635655 is 5565365012.

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

It is not a de Polignac number, because 2105635655 - 2⁴ = 2105635639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210563561 + ... + 210563570.

It is an arithmetic number, because the mean of its divisors is an integer number (631690698).

Almost surely, 2^2105635655 is an apocalyptic number.

2105635655 is a deficient number, since it is larger than the sum of its proper divisors (421127137).

2105635655 is an equidigital number, since it uses as much as digits as its factorization.

2105635655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421127136.

The product of its (nonzero) digits is 135000, while the sum is 38.

The square root of 2105635655 is about 45887.2057876703. The cubic root of 2105635655 is about 1281.7236818309.

The spelling of 2105635655 in words is "two billion, one hundred five million, six hundred thirty-five thousand, six hundred fifty-five".