163567431920 has 20 divisors (see below), whose sum is σ = 380294279400. Its totient is φ = 65426972736.

The previous prime is 163567431913. The next prime is 163567431941. The reversal of 163567431920 is 29134765361.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1022296370 + ... + 1022296529.

It is an arithmetic number, because the mean of its divisors is an integer number (19014713970).

Almost surely, 2^163567431920 is an apocalyptic number.

163567431920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163567431920 is an abundant number, since it is smaller than the sum of its proper divisors (216726847480).

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

163567431920 is a wasteful number, since it uses less digits than its factorization.

163567431920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044592912 (or 2044592906 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 47.

The spelling of 163567431920 in words is "one hundred sixty-three billion, five hundred sixty-seven million, four hundred thirty-one thousand, nine hundred twenty".