163481968428 has 12 divisors (see below), whose sum is σ = 381457926360. Its totient is φ = 54493989472.

The previous prime is 163481968427. The next prime is 163481968471. The reversal of 163481968428 is 824869184361.

It is a happy number.

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

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (163481968427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6811748673 + ... + 6811748696.

It is an arithmetic number, because the mean of its divisors is an integer number (31788160530).

Almost surely, 2^163481968428 is an apocalyptic number.

It is an amenable number.

163481968428 is an abundant number, since it is smaller than the sum of its proper divisors (217975957932).

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

163481968428 is a wasteful number, since it uses less digits than its factorization.

163481968428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13623497376 (or 13623497374 counting only the distinct ones).

The product of its digits is 15925248, while the sum is 60.

The spelling of 163481968428 in words is "one hundred sixty-three billion, four hundred eighty-one million, nine hundred sixty-eight thousand, four hundred twenty-eight".