172051720063 has 2 divisors, whose sum is σ = 172051720064. Its totient is φ = 172051720062.

The previous prime is 172051720051. The next prime is 172051720067. The reversal of 172051720063 is 360027150271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172051720063 - 2²¹ = 172049622911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172051720067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86025860031 + 86025860032.

It is an arithmetic number, because the mean of its divisors is an integer number (86025860032).

Almost surely, 2^172051720063 is an apocalyptic number.

172051720063 is a deficient number, since it is larger than the sum of its proper divisors (1).

172051720063 is an equidigital number, since it uses as much as digits as its factorization.

172051720063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640, while the sum is 34.

The spelling of 172051720063 in words is "one hundred seventy-two billion, fifty-one million, seven hundred twenty thousand, sixty-three".