205114064788405 has 8 divisors (see below), whose sum is σ = 246201701808312. Its totient is φ = 164048035789248.

The previous prime is 205114064788393. The next prime is 205114064788411. The reversal of 205114064788405 is 504887460411502.

It can be written as a sum of positive squares in 4 ways, for example, as 5591716231761 + 199522348556644 = 2364681^2 + 14125238^2 .

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 205114064788405 - 2¹⁵ = 205114064755637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5401984302 + ... + 5402022271.

It is an arithmetic number, because the mean of its divisors is an integer number (30775212726039).

Almost surely, 2^{205114064788405} is an apocalyptic number.

It is an amenable number.

205114064788405 is a deficient number, since it is larger than the sum of its proper divisors (41087637019907).

205114064788405 is a wasteful number, since it uses less digits than its factorization.

205114064788405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10804010375.

The product of its (nonzero) digits is 8601600, while the sum is 55.

The spelling of 205114064788405 in words is "two hundred five trillion, one hundred fourteen billion, sixty-four million, seven hundred eighty-eight thousand, four hundred five".