163643474 has 8 divisors (see below), whose sum is σ = 246003708. Its totient is φ = 81642240.

The previous prime is 163643453. The next prime is 163643477. The reversal of 163643474 is 474346361.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 161467849 + 2175625 = 12707^2 + 1475^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (163643477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88607 + ... + 90434.

Almost surely, 2^163643474 is an apocalyptic number.

163643474 is a deficient number, since it is larger than the sum of its proper divisors (82360234).

163643474 is a wasteful number, since it uses less digits than its factorization.

163643474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179500.

The product of its digits is 145152, while the sum is 38.

The square root of 163643474 is about 12792.3208996648. The cubic root of 163643474 is about 546.9734297671.

The spelling of 163643474 in words is "one hundred sixty-three million, six hundred forty-three thousand, four hundred seventy-four".