205535880438270 has 64 divisors (see below), whose sum is σ = 494027857589760. Its totient is φ = 54727201584000.

The previous prime is 205535880438269. The next prime is 205535880438281. The reversal of 205535880438270 is 72834088535502.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64925220 + ... + 68017320.

It is an arithmetic number, because the mean of its divisors is an integer number (7719185274840).

Almost surely, 2^{205535880438270} is an apocalyptic number.

205535880438270 is an abundant number, since it is smaller than the sum of its proper divisors (288491977151490).

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

205535880438270 is a wasteful number, since it uses less digits than its factorization.

205535880438270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3095441.

The product of its (nonzero) digits is 64512000, while the sum is 60.

The spelling of 205535880438270 in words is "two hundred five trillion, five hundred thirty-five billion, eight hundred eighty million, four hundred thirty-eight thousand, two hundred seventy".