172263640667 has 2 divisors, whose sum is σ = 172263640668. Its totient is φ = 172263640666.

The previous prime is 172263640609. The next prime is 172263640691. The reversal of 172263640667 is 766046362271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172263640667 - 2⁶ = 172263640603 is a prime.

It is not a weakly prime, because it can be changed into another prime (172263649667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86131820333 + 86131820334.

It is an arithmetic number, because the mean of its divisors is an integer number (86131820334).

Almost surely, 2^172263640667 is an apocalyptic number.

172263640667 is a deficient number, since it is larger than the sum of its proper divisors (1).

172263640667 is an equidigital number, since it uses as much as digits as its factorization.

172263640667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3048192, while the sum is 50.

The spelling of 172263640667 in words is "one hundred seventy-two billion, two hundred sixty-three million, six hundred forty thousand, six hundred sixty-seven".