320657742269 has 2 divisors, whose sum is σ = 320657742270. Its totient is φ = 320657742268.

The previous prime is 320657742211. The next prime is 320657742313. The reversal of 320657742269 is 962247756023.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 296752562500 + 23905179769 = 544750^2 + 154613^2 .

It is a cyclic number.

It is not a de Polignac number, because 320657742269 - 2²⁴ = 320640965053 is a prime.

It is a super-2 number, since 2×320657742269² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 320657742269.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320659742269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160328871134 + 160328871135.

It is an arithmetic number, because the mean of its divisors is an integer number (160328871135).

Almost surely, 2^320657742269 is an apocalyptic number.

It is an amenable number.

320657742269 is a deficient number, since it is larger than the sum of its proper divisors (1).

320657742269 is an equidigital number, since it uses as much as digits as its factorization.

320657742269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7620480, while the sum is 53.

The spelling of 320657742269 in words is "three hundred twenty billion, six hundred fifty-seven million, seven hundred forty-two thousand, two hundred sixty-nine".