163481620 has 24 divisors (see below), whose sum is σ = 346354344. Its totient is φ = 64813056.

The previous prime is 163481611. The next prime is 163481629. The reversal of 163481620 is 26184361.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (163481611) and next prime (163481629).

It can be written as a sum of positive squares in 4 ways, for example, as 2039184 + 161442436 = 1428^2 + 12706^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163481629) 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, 33909 + ... + 38428.

It is an arithmetic number, because the mean of its divisors is an integer number (14431431).

Almost surely, 2^163481620 is an apocalyptic number.

163481620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163481620 is an abundant number, since it is smaller than the sum of its proper divisors (182872724).

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

163481620 is a wasteful number, since it uses less digits than its factorization.

163481620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72459 (or 72457 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 163481620 is about 12785.9931174704. The cubic root of 163481620 is about 546.7930395593.

The spelling of 163481620 in words is "one hundred sixty-three million, four hundred eighty-one thousand, six hundred twenty".