163999056 has 40 divisors (see below), whose sum is σ = 456255520. Its totient is φ = 50461056.

The previous prime is 163999019. The next prime is 163999067. The reversal of 163999056 is 650999361.

It is a super-2 number, since 2×163999056² = 53791380737782272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 163998996 and 163999014.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130786 + ... + 132033.

It is an arithmetic number, because the mean of its divisors is an integer number (11406388).

Almost surely, 2^163999056 is an apocalyptic number.

163999056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

163999056 is an abundant number, since it is smaller than the sum of its proper divisors (292256464).

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

163999056 is a wasteful number, since it uses less digits than its factorization.

163999056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262843 (or 262837 counting only the distinct ones).

The product of its (nonzero) digits is 393660, while the sum is 48.

The square root of 163999056 is about 12806.2116178049. The cubic root of 163999056 is about 547.3693172387.

The spelling of 163999056 in words is "one hundred sixty-three million, nine hundred ninety-nine thousand, fifty-six".