1642332161 has 2 divisors, whose sum is σ = 1642332162. Its totient is φ = 1642332160.

The previous prime is 1642332157. The next prime is 1642332163. The reversal of 1642332161 is 1612332461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1259895025 + 382437136 = 35495^2 + 19556^2 .

It is a cyclic number.

It is not a de Polignac number, because 1642332161 - 2² = 1642332157 is a prime.

Together with 1642332163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1642332163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821166080 + 821166081.

It is an arithmetic number, because the mean of its divisors is an integer number (821166081).

It is a Proth number, since it is equal to 6265 ⋅ 2¹⁸ + 1 and 6265 < 2¹⁸.

Almost surely, 2^1642332161 is an apocalyptic number.

It is an amenable number.

1642332161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642332161 is an equidigital number, since it uses as much as digits as its factorization.

1642332161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 29.

The square root of 1642332161 is about 40525.6975387223. The cubic root of 1642332161 is about 1179.8324383828.

It can be divided in two parts, 16423 and 32161, that added together give a palindrome (48584).

The spelling of 1642332161 in words is "one billion, six hundred forty-two million, three hundred thirty-two thousand, one hundred sixty-one".