163721996032 has 36 divisors (see below), whose sum is σ = 373490807536. Its totient is φ = 70166568960.

The previous prime is 163721996023. The next prime is 163721996047. The reversal of 163721996032 is 230699127361.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45679569 + ... + 45683152.

Almost surely, 2^163721996032 is an apocalyptic number.

It is an amenable number.

163721996032 is an abundant number, since it is smaller than the sum of its proper divisors (209768811504).

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

163721996032 is an frugal number, since it uses more digits than its factorization.

163721996032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91362744 (or 91362730 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 49.

The spelling of 163721996032 in words is "one hundred sixty-three billion, seven hundred twenty-one million, nine hundred ninety-six thousand, thirty-two".