2105656345555 has 16 divisors (see below), whose sum is σ = 2890865776320. Its totient is φ = 1442324385792.

The previous prime is 2105656345537. The next prime is 2105656345567. The reversal of 2105656345555 is 5555436565012.

It is a cyclic number.

It is not a de Polignac number, because 2105656345555 - 2⁷ = 2105656345427 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32347254 + ... + 32412283.

It is an arithmetic number, because the mean of its divisors is an integer number (180679111020).

Almost surely, 2^{2105656345555} is an apocalyptic number.

2105656345555 is a deficient number, since it is larger than the sum of its proper divisors (785209430765).

2105656345555 is an equidigital number, since it uses as much as digits as its factorization.

2105656345555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64760478.

The product of its (nonzero) digits is 13500000, while the sum is 52.

The spelling of 2105656345555 in words is "two trillion, one hundred five billion, six hundred fifty-six million, three hundred forty-five thousand, five hundred fifty-five".