163900980 has 36 divisors (see below), whose sum is σ = 497166852. Its totient is φ = 43706880.

The previous prime is 163900949. The next prime is 163900991. The reversal of 163900980 is 89009361.

163900980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 69655716 + 94245264 = 8346^2 + 9708^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 455101 + ... + 455460.

Almost surely, 2^163900980 is an apocalyptic number.

163900980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163900980 is an abundant number, since it is smaller than the sum of its proper divisors (333265872).

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

163900980 is a wasteful number, since it uses less digits than its factorization.

163900980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910576 (or 910571 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 163900980 is about 12802.3818096478. The cubic root of 163900980 is about 547.2601814516.

The spelling of 163900980 in words is "one hundred sixty-three million, nine hundred thousand, nine hundred eighty".