320946778951499 has 2 divisors, whose sum is σ = 320946778951500. Its totient is φ = 320946778951498.

The previous prime is 320946778951457. The next prime is 320946778951507. The reversal of 320946778951499 is 994159877649023.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320946778951499 is a prime.

It is not a weakly prime, because it can be changed into another prime (320946778951699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160473389475749 + 160473389475750.

It is an arithmetic number, because the mean of its divisors is an integer number (160473389475750).

It is a 2-persistent number, because it is pandigital, and so is 2⋅320946778951499 = 641893557902998, but 3⋅320946778951499 = 962840336854497 is not.

Almost surely, 2^{320946778951499} is an apocalyptic number.

320946778951499 is a deficient number, since it is larger than the sum of its proper divisors (1).

320946778951499 is an equidigital number, since it uses as much as digits as its factorization.

320946778951499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7407106560, while the sum is 83.

The spelling of 320946778951499 in words is "three hundred twenty trillion, nine hundred forty-six billion, seven hundred seventy-eight million, nine hundred fifty-one thousand, four hundred ninety-nine".