205655182586139 has 32 divisors (see below), whose sum is σ = 322151847300864. Its totient is φ = 115049469617280.

The previous prime is 205655182586093. The next prime is 205655182586141. The reversal of 205655182586139 is 931685281556502.

It is not a de Polignac number, because 205655182586139 - 2⁹ = 205655182585627 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 205655182586139.

It is not an unprimeable number, because it can be changed into a prime (205655182586339) 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 31 ways as a sum of consecutive naturals, for example, 15897849 + ... + 25769205.

It is an arithmetic number, because the mean of its divisors is an integer number (10067245228152).

Almost surely, 2^{205655182586139} is an apocalyptic number.

205655182586139 is a deficient number, since it is larger than the sum of its proper divisors (116496664714725).

205655182586139 is a wasteful number, since it uses less digits than its factorization.

205655182586139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9919947.

The product of its (nonzero) digits is 155520000, while the sum is 66.

The spelling of 205655182586139 in words is "two hundred five trillion, six hundred fifty-five billion, one hundred eighty-two million, five hundred eighty-six thousand, one hundred thirty-nine".