204140610405 has 24 divisors (see below), whose sum is σ = 356097518712. Its totient is φ = 108181517184.

The previous prime is 204140610403. The next prime is 204140610409. The reversal of 204140610405 is 504016041402.

204140610405 is a `hidden beast` number, since 2 + 0 + 4 + 1 + 4 + 0 + 610 + 40 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2498300289 + 201642310116 = 49983^2 + 449046^2 .

It is not a de Polignac number, because 204140610405 - 2¹ = 204140610403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204140610403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14440254 + ... + 14454383.

It is an arithmetic number, because the mean of its divisors is an integer number (14837396613).

Almost surely, 2^204140610405 is an apocalyptic number.

It is an amenable number.

204140610405 is a deficient number, since it is larger than the sum of its proper divisors (151956908307).

204140610405 is a wasteful number, since it uses less digits than its factorization.

204140610405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28894805 (or 28894802 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 204140610405 its reverse (504016041402), we get a palindrome (708156651807).

The spelling of 204140610405 in words is "two hundred four billion, one hundred forty million, six hundred ten thousand, four hundred five".