205561216324 has 12 divisors (see below), whose sum is σ = 375372656064. Its totient is φ = 98311886024.

The previous prime is 205561216297. The next prime is 205561216373. The reversal of 205561216324 is 423612165502.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1117180432 + ... + 1117180615.

It is an arithmetic number, because the mean of its divisors is an integer number (31281054672).

Almost surely, 2^205561216324 is an apocalyptic number.

It is an amenable number.

205561216324 is a deficient number, since it is larger than the sum of its proper divisors (169811439740).

205561216324 is a wasteful number, since it uses less digits than its factorization.

205561216324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2234361074 (or 2234361072 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 205561216324 in words is "two hundred five billion, five hundred sixty-one million, two hundred sixteen thousand, three hundred twenty-four".