320656549454641 has 2 divisors, whose sum is σ = 320656549454642. Its totient is φ = 320656549454640.

The previous prime is 320656549454627. The next prime is 320656549454651. The reversal of 320656549454641 is 146454945656023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 313469539115041 + 7187010339600 = 17705071^2 + 2680860^2 .

It is a cyclic number.

It is not a de Polignac number, because 320656549454641 - 2²⁵ = 320656515900209 is a prime.

It is not a weakly prime, because it can be changed into another prime (320656549454651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160328274727320 + 160328274727321.

It is an arithmetic number, because the mean of its divisors is an integer number (160328274727321).

Almost surely, 2^{320656549454641} is an apocalyptic number.

It is an amenable number.

320656549454641 is a deficient number, since it is larger than the sum of its proper divisors (1).

320656549454641 is an equidigital number, since it uses as much as digits as its factorization.

320656549454641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248000, while the sum is 64.

The spelling of 320656549454641 in words is "three hundred twenty trillion, six hundred fifty-six billion, five hundred forty-nine million, four hundred fifty-four thousand, six hundred forty-one".