163385775 has 96 divisors (see below), whose sum is σ = 346803200. Its totient is φ = 73872000.

The previous prime is 163385773. The next prime is 163385791. The reversal of 163385775 is 577583361.

163385775 is a `hidden beast` number, since 1 + 633 + 8 + 5 + 7 + 7 + 5 = 666.

It is not a de Polignac number, because 163385775 - 2¹ = 163385773 is a prime.

It is a super-2 number, since 2×163385775² = 53389822944701250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 163385775.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163385773) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 713361 + ... + 713589.

Almost surely, 2^163385775 is an apocalyptic number.

163385775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

163385775 is an abundant number, since it is smaller than the sum of its proper divisors (183417425).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163385775 is a wasteful number, since it uses less digits than its factorization.

163385775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406 (or 395 counting only the distinct ones).

The product of its digits is 529200, while the sum is 45.

The square root of 163385775 is about 12782.2445212099. The cubic root of 163385775 is about 546.6861618485.

The spelling of 163385775 in words is "one hundred sixty-three million, three hundred eighty-five thousand, seven hundred seventy-five".