204864045870 has 32 divisors (see below), whose sum is σ = 536371320960. Its totient is φ = 49664011040.

The previous prime is 204864045839. The next prime is 204864045871. The reversal of 204864045870 is 78540468402.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204864045871) 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, 310399740 + ... + 310400399.

It is an arithmetic number, because the mean of its divisors is an integer number (16761603780).

Almost surely, 2^204864045870 is an apocalyptic number.

204864045870 is an abundant number, since it is smaller than the sum of its proper divisors (331507275090).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204864045870 is a wasteful number, since it uses less digits than its factorization.

204864045870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620800160.

The product of its (nonzero) digits is 1720320, while the sum is 48.

The spelling of 204864045870 in words is "two hundred four billion, eight hundred sixty-four million, forty-five thousand, eight hundred seventy".