163649520 has 120 divisors (see below), whose sum is σ = 564535296. Its totient is φ = 42453504.

The previous prime is 163649513. The next prime is 163649543. The reversal of 163649520 is 25946361.

It is a happy number.

163649520 is a `hidden beast` number, since 1 + 6 + 3 + 649 + 5 + 2 + 0 = 666.

163649520 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (120).

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

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 23 ways as a sum of consecutive naturals, for example, 23569 + ... + 29711.

Almost surely, 2^163649520 is an apocalyptic number.

163649520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163649520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282267648).

163649520 is an abundant number, since it is smaller than the sum of its proper divisors (400885776).

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

163649520 is a wasteful number, since it uses less digits than its factorization.

163649520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6199 (or 6190 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 163649520 is about 12792.5572111287. The cubic root of 163649520 is about 546.9801658756.

The spelling of 163649520 in words is "one hundred sixty-three million, six hundred forty-nine thousand, five hundred twenty".