205109391129310 has 32 divisors (see below), whose sum is σ = 369876853224000. Its totient is φ = 81892703742720.

The previous prime is 205109391129233. The next prime is 205109391129317. The reversal of 205109391129310 is 13921193901502.

It is a super-2 number, since 2×205109391129310² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205109391129317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31926546 + ... + 37809034.

It is an arithmetic number, because the mean of its divisors is an integer number (11558651663250).

Almost surely, 2^{205109391129310} is an apocalyptic number.

205109391129310 is a deficient number, since it is larger than the sum of its proper divisors (164767462094690).

205109391129310 is a wasteful number, since it uses less digits than its factorization.

205109391129310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5888916.

The product of its (nonzero) digits is 131220, while the sum is 46.

The spelling of 205109391129310 in words is "two hundred five trillion, one hundred nine billion, three hundred ninety-one million, one hundred twenty-nine thousand, three hundred ten".