4021767161 has 2 divisors, whose sum is σ = 4021767162. Its totient is φ = 4021767160.

The previous prime is 4021767151. The next prime is 4021767179. The reversal of 4021767161 is 1617671204.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2572518400 + 1449248761 = 50720^2 + 38069^2 .

It is a cyclic number.

It is not a de Polignac number, because 4021767161 - 2¹⁸ = 4021505017 is a prime.

It is a super-2 number, since 2×4021767161² = 32349222194595999842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4021767131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010883580 + 2010883581.

It is an arithmetic number, because the mean of its divisors is an integer number (2010883581).

Almost surely, 2^4021767161 is an apocalyptic number.

It is an amenable number.

4021767161 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021767161 is an equidigital number, since it uses as much as digits as its factorization.

4021767161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 4021767161 is about 63417.4042436302. The cubic root of 4021767161 is about 1590.2752791313.

The spelling of 4021767161 in words is "four billion, twenty-one million, seven hundred sixty-seven thousand, one hundred sixty-one".