6435890173 has 2 divisors, whose sum is σ = 6435890174. Its totient is φ = 6435890172.

The previous prime is 6435890161. The next prime is 6435890177. The reversal of 6435890173 is 3710985346.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4048395129 + 2387495044 = 63627^2 + 48862^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6435890173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6435890177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3217945086 + 3217945087.

It is an arithmetic number, because the mean of its divisors is an integer number (3217945087).

Almost surely, 2^6435890173 is an apocalyptic number.

It is an amenable number.

6435890173 is a deficient number, since it is larger than the sum of its proper divisors (1).

6435890173 is an equidigital number, since it uses as much as digits as its factorization.

6435890173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 46.

The square root of 6435890173 is about 80223.9999813024. Note that the first 4 decimals coincide. The cubic root of 6435890173 is about 1860.0996374921.

The spelling of 6435890173 in words is "six billion, four hundred thirty-five million, eight hundred ninety thousand, one hundred seventy-three".