163000400246581 has 2 divisors, whose sum is σ = 163000400246582. Its totient is φ = 163000400246580.

The previous prime is 163000400246531. The next prime is 163000400246633. The reversal of 163000400246581 is 185642004000361.

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., 160435409016100 + 2564991230481 = 12666310^2 + 1601559^2 .

It is an emirp because it is prime and its reverse (185642004000361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163000400246581 - 2⁴⁵ = 127816028157749 is a prime.

It is a super-2 number, since 2×163000400246581² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163000400246531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81500200123290 + 81500200123291.

It is an arithmetic number, because the mean of its divisors is an integer number (81500200123291).

Almost surely, 2^{163000400246581} is an apocalyptic number.

It is an amenable number.

163000400246581 is a deficient number, since it is larger than the sum of its proper divisors (1).

163000400246581 is an equidigital number, since it uses as much as digits as its factorization.

163000400246581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 163000400246581 in words is "one hundred sixty-three trillion, four hundred million, two hundred forty-six thousand, five hundred eighty-one".