163955745 has 56 divisors (see below), whose sum is σ = 304710912. Its totient is φ = 84564000.

The previous prime is 163955719. The next prime is 163955777. The reversal of 163955745 is 547559361.

163955745 is a `hidden beast` number, since 1 + 639 + 5 + 5 + 7 + 4 + 5 = 666.

It is not a de Polignac number, because 163955745 - 2⁵ = 163955713 is a prime.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 163955745.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 112270 + ... + 113720.

Almost surely, 2^163955745 is an apocalyptic number.

163955745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

163955745 is a deficient number, since it is larger than the sum of its proper divisors (140755167).

163955745 is an equidigital number, since it uses as much as digits as its factorization.

163955745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1505 (or 1490 counting only the distinct ones).

The product of its digits is 567000, while the sum is 45.

The square root of 163955745 is about 12804.5204908267. The cubic root of 163955745 is about 547.3211275309.

The spelling of 163955745 in words is "one hundred sixty-three million, nine hundred fifty-five thousand, seven hundred forty-five".