1205550505055 has 32 divisors (see below), whose sum is σ = 1600153047360. Its totient is φ = 866246814720.

The previous prime is 1205550505021. The next prime is 1205550505069. The reversal of 1205550505055 is 5505050555021.

It is not a de Polignac number, because 1205550505055 - 2³⁸ = 930672598111 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 413249 + ... + 1606821.

It is an arithmetic number, because the mean of its divisors is an integer number (50004782730).

Almost surely, 2^{1205550505055} is an apocalyptic number.

1205550505055 is a deficient number, since it is larger than the sum of its proper divisors (394602542305).

1205550505055 is a wasteful number, since it uses less digits than its factorization.

1205550505055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194011.

The product of its (nonzero) digits is 156250, while the sum is 38.

The spelling of 1205550505055 in words is "one trillion, two hundred five billion, five hundred fifty million, five hundred five thousand, fifty-five".