163081944 has 32 divisors (see below), whose sum is σ = 453006000. Its totient is φ = 54360576.

The previous prime is 163081931. The next prime is 163081949. The reversal of 163081944 is 449180361.

163081944 is a `hidden beast` number, since 1 + 630 + 8 + 19 + 4 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 163081899 and 163081908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163081949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 377289 + ... + 377720.

Almost surely, 2^163081944 is an apocalyptic number.

It is an amenable number.

163081944 is an abundant number, since it is smaller than the sum of its proper divisors (289924056).

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

163081944 is a wasteful number, since it uses less digits than its factorization.

163081944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755024 (or 755014 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 163081944 is about 12770.3541062885. The cubic root of 163081944 is about 546.3470803724.

It can be divided in two parts, 163081 and 944, that added together give a square (164025 = 405²).

The spelling of 163081944 in words is "one hundred sixty-three million, eighty-one thousand, nine hundred forty-four".