320154203460521 has 2 divisors, whose sum is σ = 320154203460522. Its totient is φ = 320154203460520.

The previous prime is 320154203460493. The next prime is 320154203460529. The reversal of 320154203460521 is 125064302451023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183821397705625 + 136332805754896 = 13558075^2 + 11676164^2 .

It is a cyclic number.

It is not a de Polignac number, because 320154203460521 - 2²⁶ = 320154136351657 is a prime.

It is not a weakly prime, because it can be changed into another prime (320154203460529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160077101730260 + 160077101730261.

It is an arithmetic number, because the mean of its divisors is an integer number (160077101730261).

Almost surely, 2^{320154203460521} is an apocalyptic number.

It is an amenable number.

320154203460521 is a deficient number, since it is larger than the sum of its proper divisors (1).

320154203460521 is an equidigital number, since it uses as much as digits as its factorization.

320154203460521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 320154203460521 in words is "three hundred twenty trillion, one hundred fifty-four billion, two hundred three million, four hundred sixty thousand, five hundred twenty-one".