172263640641 has 4 divisors (see below), whose sum is σ = 229684854192. Its totient is φ = 114842427092.

The previous prime is 172263640609. The next prime is 172263640667. The reversal of 172263640641 is 146046362271.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 172263640641 - 2⁵ = 172263640609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172263640593 and 172263640602.

It is not an unprimeable number, because it can be changed into a prime (172263640691) 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 3 ways as a sum of consecutive naturals, for example, 28710606771 + ... + 28710606776.

It is an arithmetic number, because the mean of its divisors is an integer number (57421213548).

Almost surely, 2^172263640641 is an apocalyptic number.

It is an amenable number.

172263640641 is a deficient number, since it is larger than the sum of its proper divisors (57421213551).

172263640641 is an equidigital number, since it uses as much as digits as its factorization.

172263640641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57421213550.

The product of its (nonzero) digits is 290304, while the sum is 42.

The spelling of 172263640641 in words is "one hundred seventy-two billion, two hundred sixty-three million, six hundred forty thousand, six hundred forty-one".