172381856303 has 2 divisors, whose sum is σ = 172381856304. Its totient is φ = 172381856302.

The previous prime is 172381856249. The next prime is 172381856321. The reversal of 172381856303 is 303658183271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172381856303 - 2⁶ = 172381856239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172381858303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86190928151 + 86190928152.

It is an arithmetic number, because the mean of its divisors is an integer number (86190928152).

Almost surely, 2^172381856303 is an apocalyptic number.

172381856303 is a deficient number, since it is larger than the sum of its proper divisors (1).

172381856303 is an equidigital number, since it uses as much as digits as its factorization.

172381856303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 172381856303 in words is "one hundred seventy-two billion, three hundred eighty-one million, eight hundred fifty-six thousand, three hundred three".