205366055011555 has 32 divisors (see below), whose sum is σ = 247219442746560. Its totient is φ = 163773651148800.

The previous prime is 205366055011553. The next prime is 205366055011571. The reversal of 205366055011555 is 555110550663502.

It is not a de Polignac number, because 205366055011555 - 2¹ = 205366055011553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 205366055011499 and 205366055011508.

It is not an unprimeable number, because it can be changed into a prime (205366055011553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19372323255 + ... + 19372333855.

It is an arithmetic number, because the mean of its divisors is an integer number (7725607585830).

Almost surely, 2^{205366055011555} is an apocalyptic number.

205366055011555 is a deficient number, since it is larger than the sum of its proper divisors (41853387735005).

205366055011555 is a wasteful number, since it uses less digits than its factorization.

205366055011555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20391.

The product of its (nonzero) digits is 3375000, while the sum is 49.

The spelling of 205366055011555 in words is "two hundred five trillion, three hundred sixty-six billion, fifty-five million, eleven thousand, five hundred fifty-five".