320040440077 has 2 divisors, whose sum is σ = 320040440078. Its totient is φ = 320040440076.

The previous prime is 320040440039. The next prime is 320040440201. The reversal of 320040440077 is 770044040023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 311558214276 + 8482225801 = 558174^2 + 92099^2 .

It is a cyclic number.

It is not a de Polignac number, because 320040440077 - 2³¹ = 317892956429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320040240077) 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, 160020220038 + 160020220039.

It is an arithmetic number, because the mean of its divisors is an integer number (160020220039).

Almost surely, 2^320040440077 is an apocalyptic number.

It is an amenable number.

320040440077 is a deficient number, since it is larger than the sum of its proper divisors (1).

320040440077 is an equidigital number, since it uses as much as digits as its factorization.

320040440077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 31.

The spelling of 320040440077 in words is "three hundred twenty billion, forty million, four hundred forty thousand, seventy-seven".