420057692161 has 2 divisors, whose sum is σ = 420057692162. Its totient is φ = 420057692160.

The previous prime is 420057692147. The next prime is 420057692179. The reversal of 420057692161 is 161296750024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 291405632400 + 128652059761 = 539820^2 + 358681^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420057692161 is a prime.

It is not a weakly prime, because it can be changed into another prime (420057692111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210028846080 + 210028846081.

It is an arithmetic number, because the mean of its divisors is an integer number (210028846081).

Almost surely, 2^420057692161 is an apocalyptic number.

It is an amenable number.

420057692161 is a deficient number, since it is larger than the sum of its proper divisors (1).

420057692161 is an equidigital number, since it uses as much as digits as its factorization.

420057692161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 420057692161 in words is "four hundred twenty billion, fifty-seven million, six hundred ninety-two thousand, one hundred sixty-one".