320956258477 has 2 divisors, whose sum is σ = 320956258478. Its totient is φ = 320956258476.

The previous prime is 320956258463. The next prime is 320956258517. The reversal of 320956258477 is 774852659023.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221369309001 + 99586949476 = 470499^2 + 315574^2 .

It is a cyclic number.

It is not a de Polignac number, because 320956258477 - 2⁷ = 320956258349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320956258577) 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, 160478129238 + 160478129239.

It is an arithmetic number, because the mean of its divisors is an integer number (160478129239).

Almost surely, 2^320956258477 is an apocalyptic number.

It is an amenable number.

320956258477 is a deficient number, since it is larger than the sum of its proper divisors (1).

320956258477 is an equidigital number, since it uses as much as digits as its factorization.

320956258477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25401600, while the sum is 58.

The spelling of 320956258477 in words is "three hundred twenty billion, nine hundred fifty-six million, two hundred fifty-eight thousand, four hundred seventy-seven".