205443553836 has 12 divisors (see below), whose sum is σ = 479368292312. Its totient is φ = 68481184608.

The previous prime is 205443553831. The next prime is 205443553853. The reversal of 205443553836 is 638355344502.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (205443553831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8560148065 + ... + 8560148088.

Almost surely, 2^205443553836 is an apocalyptic number.

It is an amenable number.

205443553836 is an abundant number, since it is smaller than the sum of its proper divisors (273924738476).

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

205443553836 is a wasteful number, since it uses less digits than its factorization.

205443553836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17120296160 (or 17120296158 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 48.

The spelling of 205443553836 in words is "two hundred five billion, four hundred forty-three million, five hundred fifty-three thousand, eight hundred thirty-six".