205351261366013 has 16 divisors (see below), whose sum is σ = 247039513096320. Its totient is φ = 166751129074176.

The previous prime is 205351261366007. The next prime is 205351261366021. The reversal of 205351261366013 is 310663162153502.

It is a cyclic number.

It is not a de Polignac number, because 205351261366013 - 2¹⁴ = 205351261349629 is a prime.

It is a super-2 number, since 2×205351261366013² (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 (205351261366513) 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, 142571381 + ... + 144004517.

It is an arithmetic number, because the mean of its divisors is an integer number (15439969568520).

Almost surely, 2^{205351261366013} is an apocalyptic number.

It is an amenable number.

205351261366013 is a deficient number, since it is larger than the sum of its proper divisors (41688251730307).

205351261366013 is a wasteful number, since it uses less digits than its factorization.

205351261366013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2510516.

The product of its (nonzero) digits is 583200, while the sum is 44.

The spelling of 205351261366013 in words is "two hundred five trillion, three hundred fifty-one billion, two hundred sixty-one million, three hundred sixty-six thousand, thirteen".