163523671272 has 144 divisors (see below), whose sum is σ = 480257294400. Its totient is φ = 50242308480.

The previous prime is 163523671253. The next prime is 163523671349. The reversal of 163523671272 is 272176325361.

163523671272 is a `hidden beast` number, since 1 + 63 + 523 + 67 + 1 + 2 + 7 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8739447 + ... + 8758137.

It is an arithmetic number, because the mean of its divisors is an integer number (3335120100).

Almost surely, 2^163523671272 is an apocalyptic number.

163523671272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163523671272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240128647200).

163523671272 is an abundant number, since it is smaller than the sum of its proper divisors (316733623128).

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

163523671272 is a wasteful number, since it uses less digits than its factorization.

163523671272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19448 (or 19428 counting only the distinct ones).

The product of its digits is 635040, while the sum is 45.

The spelling of 163523671272 in words is "one hundred sixty-three billion, five hundred twenty-three million, six hundred seventy-one thousand, two hundred seventy-two".