204115531202164 has 6 divisors (see below), whose sum is σ = 357202179603794. Its totient is φ = 102057765601080.

The previous prime is 204115531202137. The next prime is 204115531202183. The reversal of 204115531202164 is 461202135511402.

It can be written as a sum of positive squares in only one way, i.e., 116046540800100 + 88068990402064 = 10772490^2 + 9384508^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25514441400267 + ... + 25514441400274.

Almost surely, 2^{204115531202164} is an apocalyptic number.

It is an amenable number.

204115531202164 is a deficient number, since it is larger than the sum of its proper divisors (153086648401630).

204115531202164 is a wasteful number, since it uses less digits than its factorization.

204115531202164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51028882800545 (or 51028882800543 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 37.

Adding to 204115531202164 its reverse (461202135511402), we get a palindrome (665317666713566).

The spelling of 204115531202164 in words is "two hundred four trillion, one hundred fifteen billion, five hundred thirty-one million, two hundred two thousand, one hundred sixty-four".