172620188243 has 8 divisors (see below), whose sum is σ = 173037095616. Its totient is φ = 172203465600.

The previous prime is 172620188233. The next prime is 172620188267. The reversal of 172620188243 is 342881026271.

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

It is a cyclic number.

It is not a de Polignac number, because 172620188243 - 2¹⁴ = 172620171859 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172620188194 and 172620188203.

It is not an unprimeable number, because it can be changed into a prime (172620188233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1926038 + ... + 2013668.

It is an arithmetic number, because the mean of its divisors is an integer number (21629636952).

Almost surely, 2^172620188243 is an apocalyptic number.

172620188243 is a deficient number, since it is larger than the sum of its proper divisors (416907373).

172620188243 is an equidigital number, since it uses as much as digits as its factorization.

172620188243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92365.

The product of its (nonzero) digits is 258048, while the sum is 44.

The spelling of 172620188243 in words is "one hundred seventy-two billion, six hundred twenty million, one hundred eighty-eight thousand, two hundred forty-three".