205530306355 has 32 divisors (see below), whose sum is σ = 283314931200. Its totient is φ = 141561331200.

The previous prime is 205530306329. The next prime is 205530306383. The reversal of 205530306355 is 553603035502.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-205530306355 is a prime.

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, 3196170 + ... + 3259840.

It is an arithmetic number, because the mean of its divisors is an integer number (8853591600).

Almost surely, 2^205530306355 is an apocalyptic number.

205530306355 is a deficient number, since it is larger than the sum of its proper divisors (77784624845).

205530306355 is a wasteful number, since it uses less digits than its factorization.

205530306355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66795.

The product of its (nonzero) digits is 202500, while the sum is 37.

The spelling of 205530306355 in words is "two hundred five billion, five hundred thirty million, three hundred six thousand, three hundred fifty-five".