172275666401 has 4 divisors (see below), whose sum is σ = 174846945072. Its totient is φ = 169704387732.

The previous prime is 172275666389. The next prime is 172275666419. The reversal of 172275666401 is 104666572271.

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 a de Polignac number, because none of the positive numbers 2^k-172275666401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172275666301) 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, 1285639235 + ... + 1285639368.

It is an arithmetic number, because the mean of its divisors is an integer number (43711736268).

Almost surely, 2^172275666401 is an apocalyptic number.

It is an amenable number.

172275666401 is a deficient number, since it is larger than the sum of its proper divisors (2571278671).

172275666401 is an equidigital number, since it uses as much as digits as its factorization.

172275666401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2571278670.

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 172275666401 in words is "one hundred seventy-two billion, two hundred seventy-five million, six hundred sixty-six thousand, four hundred one".