6440161463 has 2 divisors, whose sum is σ = 6440161464. Its totient is φ = 6440161462.

The previous prime is 6440161451. The next prime is 6440161477. The reversal of 6440161463 is 3641610446.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6440161463 - 2¹⁴ = 6440145079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6440161423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3220080731 + 3220080732.

It is an arithmetic number, because the mean of its divisors is an integer number (3220080732).

Almost surely, 2^6440161463 is an apocalyptic number.

6440161463 is a deficient number, since it is larger than the sum of its proper divisors (1).

6440161463 is an equidigital number, since it uses as much as digits as its factorization.

6440161463 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 6440161463 is about 80250.6165895316. The cubic root of 6440161463 is about 1860.5110422756.

The spelling of 6440161463 in words is "six billion, four hundred forty million, one hundred sixty-one thousand, four hundred sixty-three".