163354681 has 12 divisors (see below), whose sum is σ = 190294272. Its totient is φ = 139819848.

The previous prime is 163354661. The next prime is 163354727. The reversal of 163354681 is 186453361.

163354681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 163354681 - 2¹⁷ = 163223609 is a prime.

It is a super-2 number, since 2×163354681² = 53369503609223522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 163354681.

It is not an unprimeable number, because it can be changed into a prime (163354661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40356 + ... + 44218.

It is an arithmetic number, because the mean of its divisors is an integer number (15857856).

Almost surely, 2^163354681 is an apocalyptic number.

It is an amenable number.

163354681 is a deficient number, since it is larger than the sum of its proper divisors (26939591).

163354681 is an equidigital number, since it uses as much as digits as its factorization.

163354681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4740 (or 4733 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

The square root of 163354681 is about 12781.0281667791. The cubic root of 163354681 is about 546.6514796412.

Subtracting from 163354681 its product of digits (51840), we obtain a square (163302841 = 12779²).

The spelling of 163354681 in words is "one hundred sixty-three million, three hundred fifty-four thousand, six hundred eighty-one".