163439955 has 96 divisors (see below), whose sum is σ = 357986304. Its totient is φ = 67212288.

The previous prime is 163439933. The next prime is 163439963. The reversal of 163439955 is 559934361.

163439955 is a `hidden beast` number, since 1 + 634 + 3 + 9 + 9 + 5 + 5 = 666.

It is not a de Polignac number, because 163439955 - 2⁹ = 163439443 is a prime.

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 163439955.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 122502 + ... + 123828.

It is an arithmetic number, because the mean of its divisors is an integer number (3729024).

Almost surely, 2^163439955 is an apocalyptic number.

163439955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

163439955 is an abundant number, since it is smaller than the sum of its proper divisors (194546349).

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

163439955 is a wasteful number, since it uses less digits than its factorization.

163439955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385 (or 1382 counting only the distinct ones).

The product of its digits is 437400, while the sum is 45.

The square root of 163439955 is about 12784.3636916352. The cubic root of 163439955 is about 546.7465836383.

The spelling of 163439955 in words is "one hundred sixty-three million, four hundred thirty-nine thousand, nine hundred fifty-five".