320006268557 has 2 divisors, whose sum is σ = 320006268558. Its totient is φ = 320006268556.

The previous prime is 320006268493. The next prime is 320006268587. The reversal of 320006268557 is 755862600023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222303763081 + 97702505476 = 471491^2 + 312574^2 .

It is a cyclic number.

It is not a de Polignac number, because 320006268557 - 2⁶ = 320006268493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320006268587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160003134278 + 160003134279.

It is an arithmetic number, because the mean of its divisors is an integer number (160003134279).

Almost surely, 2^320006268557 is an apocalyptic number.

It is an amenable number.

320006268557 is a deficient number, since it is larger than the sum of its proper divisors (1).

320006268557 is an equidigital number, since it uses as much as digits as its factorization.

320006268557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 320006268557 in words is "three hundred twenty billion, six million, two hundred sixty-eight thousand, five hundred fifty-seven".