42400104161 has 2 divisors, whose sum is σ = 42400104162. Its totient is φ = 42400104160.

The previous prime is 42400104059. The next prime is 42400104169. The reversal of 42400104161 is 16140100424.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26775104161 + 15625000000 = 163631^2 + 125000^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42400104161 is a prime.

It is not a weakly prime, because it can be changed into another prime (42400104169) 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, 21200052080 + 21200052081.

It is an arithmetic number, because the mean of its divisors is an integer number (21200052081).

Almost surely, 2^42400104161 is an apocalyptic number.

It is an amenable number.

42400104161 is a deficient number, since it is larger than the sum of its proper divisors (1).

42400104161 is an equidigital number, since it uses as much as digits as its factorization.

42400104161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 42400104161 its reverse (16140100424), we get a palindrome (58540204585).

The spelling of 42400104161 in words is "forty-two billion, four hundred million, one hundred four thousand, one hundred sixty-one".