2905204672805 has 16 divisors (see below), whose sum is σ = 3720002531520. Its totient is φ = 2171677143168.

The previous prime is 2905204672759. The next prime is 2905204672829. The reversal of 2905204672805 is 5082764025092.

It is a cyclic number.

It is not a de Polignac number, because 2905204672805 - 2¹⁶ = 2905204607269 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209452667 + ... + 209466536.

It is an arithmetic number, because the mean of its divisors is an integer number (232500158220).

Almost surely, 2^{2905204672805} is an apocalyptic number.

It is an amenable number.

2905204672805 is a deficient number, since it is larger than the sum of its proper divisors (814797858715).

2905204672805 is a wasteful number, since it uses less digits than its factorization.

2905204672805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418919300.

The product of its (nonzero) digits is 2419200, while the sum is 50.

Adding to 2905204672805 its reverse (5082764025092), we get a palindrome (7987968697897).

The spelling of 2905204672805 in words is "two trillion, nine hundred five billion, two hundred four million, six hundred seventy-two thousand, eight hundred five".