163172677428 has 36 divisors (see below), whose sum is σ = 430397499168. Its totient is φ = 52026070800.

The previous prime is 163172677427. The next prime is 163172677433. The reversal of 163172677428 is 824776271361.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163172677427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 98533398 + ... + 98535053.

It is an arithmetic number, because the mean of its divisors is an integer number (11955486088).

Almost surely, 2^163172677428 is an apocalyptic number.

163172677428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

163172677428 is an abundant number, since it is smaller than the sum of its proper divisors (267224821740).

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

163172677428 is a wasteful number, since it uses less digits than its factorization.

163172677428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197068484 (or 197068479 counting only the distinct ones).

The product of its digits is 4741632, while the sum is 54.

The spelling of 163172677428 in words is "one hundred sixty-three billion, one hundred seventy-two million, six hundred seventy-seven thousand, four hundred twenty-eight".