205555555502 has 16 divisors (see below), whose sum is σ = 336769412400. Its totient is φ = 93321627840.

The previous prime is 205555555459. The next prime is 205555555507.

It is a happy number.

205555555502 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205555555507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5617127 + ... + 5653602.

It is an arithmetic number, because the mean of its divisors is an integer number (21048088275).

Almost surely, 2^205555555502 is an apocalyptic number.

205555555502 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

205555555502 is a deficient number, since it is larger than the sum of its proper divisors (131213856898).

205555555502 is a wasteful number, since it uses less digits than its factorization.

205555555502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11271571.

The product of its (nonzero) digits is 1562500, while the sum is 44.

The spelling of 205555555502 in words is "two hundred five billion, five hundred fifty-five million, five hundred fifty-five thousand, five hundred two".