205163611361 has 16 divisors (see below), whose sum is σ = 211909219200. Its totient is φ = 198505153920.

The previous prime is 205163611357. The next prime is 205163611379. The reversal of 205163611361 is 163116361502.

It is not a de Polignac number, because 205163611361 - 2² = 205163611357 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205163611661) 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, 3926570 + ... + 3978476.

It is an arithmetic number, because the mean of its divisors is an integer number (13244326200).

Almost surely, 2^205163611361 is an apocalyptic number.

It is an amenable number.

205163611361 is a deficient number, since it is larger than the sum of its proper divisors (6745607839).

205163611361 is a wasteful number, since it uses less digits than its factorization.

205163611361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52744.

The product of its (nonzero) digits is 19440, while the sum is 35.

Adding to 205163611361 its reverse (163116361502), we get a palindrome (368279972863).

The spelling of 205163611361 in words is "two hundred five billion, one hundred sixty-three million, six hundred eleven thousand, three hundred sixty-one".