320577140761 has 2 divisors, whose sum is σ = 320577140762. Its totient is φ = 320577140760.

The previous prime is 320577140747. The next prime is 320577140791. The reversal of 320577140761 is 167041775023.

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., 319179801600 + 1397339161 = 564960^2 + 37381^2 .

It is a cyclic number.

It is not a de Polignac number, because 320577140761 - 2⁷ = 320577140633 is a prime.

It is not a weakly prime, because it can be changed into another prime (320577140731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160288570380 + 160288570381.

It is an arithmetic number, because the mean of its divisors is an integer number (160288570381).

Almost surely, 2^320577140761 is an apocalyptic number.

It is an amenable number.

320577140761 is a deficient number, since it is larger than the sum of its proper divisors (1).

320577140761 is an equidigital number, since it uses as much as digits as its factorization.

320577140761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 246960, while the sum is 43.

The spelling of 320577140761 in words is "three hundred twenty billion, five hundred seventy-seven million, one hundred forty thousand, seven hundred sixty-one".