205915193255 has 8 divisors (see below), whose sum is σ = 247132419072. Its totient is φ = 164709363168.

The previous prime is 205915193251. The next prime is 205915193261. The reversal of 205915193255 is 552391519502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205915193255 - 2² = 205915193251 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205915193251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2809127 + ... + 2881496.

It is an arithmetic number, because the mean of its divisors is an integer number (30891552384).

Almost surely, 2^205915193255 is an apocalyptic number.

205915193255 is a deficient number, since it is larger than the sum of its proper divisors (41217225817).

205915193255 is an equidigital number, since it uses as much as digits as its factorization.

205915193255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5697865.

The product of its (nonzero) digits is 607500, while the sum is 47.

The spelling of 205915193255 in words is "two hundred five billion, nine hundred fifteen million, one hundred ninety-three thousand, two hundred fifty-five".