163721547156 has 12 divisors (see below), whose sum is σ = 382016943392. Its totient is φ = 54573849048.

The previous prime is 163721547109. The next prime is 163721547191. The reversal of 163721547156 is 651745127361.

It is a tau number, because it is divible by the number of its divisors (12).

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, 6821731120 + ... + 6821731143.

Almost surely, 2^163721547156 is an apocalyptic number.

It is an amenable number.

163721547156 is an abundant number, since it is smaller than the sum of its proper divisors (218295396236).

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

163721547156 is a wasteful number, since it uses less digits than its factorization.

163721547156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13643462270 (or 13643462268 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 48.

The spelling of 163721547156 in words is "one hundred sixty-three billion, seven hundred twenty-one million, five hundred forty-seven thousand, one hundred fifty-six".