202604421161 has 2 divisors, whose sum is σ = 202604421162. Its totient is φ = 202604421160.

The previous prime is 202604421139. The next prime is 202604421223. The reversal of 202604421161 is 161124406202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148278134761 + 54326286400 = 385069^2 + 233080^2 .

It is a cyclic number.

It is not a de Polignac number, because 202604421161 - 2¹⁴ = 202604404777 is a prime.

It is not a weakly prime, because it can be changed into another prime (202604429161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101302210580 + 101302210581.

It is an arithmetic number, because the mean of its divisors is an integer number (101302210581).

Almost surely, 2^202604421161 is an apocalyptic number.

It is an amenable number.

202604421161 is a deficient number, since it is larger than the sum of its proper divisors (1).

202604421161 is an equidigital number, since it uses as much as digits as its factorization.

202604421161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 29.

Adding to 202604421161 its reverse (161124406202), we get a palindrome (363728827363).

The spelling of 202604421161 in words is "two hundred two billion, six hundred four million, four hundred twenty-one thousand, one hundred sixty-one".