163817541393 has 16 divisors (see below), whose sum is σ = 238832934912. Its totient is φ = 99052994000.

The previous prime is 163817541361. The next prime is 163817541413. The reversal of 163817541393 is 393145718361.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 163817541393 - 2⁵ = 163817541361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163817548393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5744673 + ... + 5773118.

It is an arithmetic number, because the mean of its divisors is an integer number (14927058432).

Almost surely, 2^163817541393 is an apocalyptic number.

It is an amenable number.

163817541393 is a deficient number, since it is larger than the sum of its proper divisors (75015393519).

163817541393 is a wasteful number, since it uses less digits than its factorization.

163817541393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11518236.

The product of its digits is 1632960, while the sum is 51.

The spelling of 163817541393 in words is "one hundred sixty-three billion, eight hundred seventeen million, five hundred forty-one thousand, three hundred ninety-three".