320381078887 has 2 divisors, whose sum is σ = 320381078888. Its totient is φ = 320381078886.

The previous prime is 320381078881. The next prime is 320381078987. The reversal of 320381078887 is 788870183023.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320381078887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320381078881) 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, 160190539443 + 160190539444.

It is an arithmetic number, because the mean of its divisors is an integer number (160190539444).

Almost surely, 2^320381078887 is an apocalyptic number.

320381078887 is a deficient number, since it is larger than the sum of its proper divisors (1).

320381078887 is an equidigital number, since it uses as much as digits as its factorization.

320381078887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3612672, while the sum is 55.

The spelling of 320381078887 in words is "three hundred twenty billion, three hundred eighty-one million, seventy-eight thousand, eight hundred eighty-seven".