320508650173 has 2 divisors, whose sum is σ = 320508650174. Its totient is φ = 320508650172.

The previous prime is 320508650141. The next prime is 320508650179. The reversal of 320508650173 is 371056805023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200755971364 + 119752678809 = 448058^2 + 346053^2 .

It is a cyclic number.

It is not a de Polignac number, because 320508650173 - 2⁵ = 320508650141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320508650179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160254325086 + 160254325087.

It is an arithmetic number, because the mean of its divisors is an integer number (160254325087).

Almost surely, 2^320508650173 is an apocalyptic number.

It is an amenable number.

320508650173 is a deficient number, since it is larger than the sum of its proper divisors (1).

320508650173 is an equidigital number, since it uses as much as digits as its factorization.

320508650173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 40.

The spelling of 320508650173 in words is "three hundred twenty billion, five hundred eight million, six hundred fifty thousand, one hundred seventy-three".