172123543163 has 8 divisors (see below), whose sum is σ = 202215071856. Its totient is φ = 144439336800.

The previous prime is 172123543127. The next prime is 172123543243. The reversal of 172123543163 is 361345321271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 172123543163 - 2¹² = 172123539067 is a prime.

It is a super-2 number, since 2×172123543163² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172123543063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 601830428 + ... + 601830713.

It is an arithmetic number, because the mean of its divisors is an integer number (25276883982).

Almost surely, 2^172123543163 is an apocalyptic number.

172123543163 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

172123543163 is a deficient number, since it is larger than the sum of its proper divisors (30091528693).

172123543163 is a wasteful number, since it uses less digits than its factorization.

172123543163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203661165.

The product of its digits is 90720, while the sum is 38.

The spelling of 172123543163 in words is "one hundred seventy-two billion, one hundred twenty-three million, five hundred forty-three thousand, one hundred sixty-three".