320946778951507 has 2 divisors, whose sum is σ = 320946778951508. Its totient is φ = 320946778951506.

The previous prime is 320946778951499. The next prime is 320946778951541. The reversal of 320946778951507 is 705159877649023.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320946778951507 - 2³ = 320946778951499 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320946778951507.

It is not a weakly prime, because it can be changed into another prime (320946778951577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160473389475753 + 160473389475754.

It is an arithmetic number, because the mean of its divisors is an integer number (160473389475754).

It is a 1-persistent number, because it is pandigital, but 2⋅320946778951507 = 641893557903014 is not.

Almost surely, 2^{320946778951507} is an apocalyptic number.

320946778951507 is a deficient number, since it is larger than the sum of its proper divisors (1).

320946778951507 is an equidigital number, since it uses as much as digits as its factorization.

320946778951507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 800150400, while the sum is 73.

The spelling of 320946778951507 in words is "three hundred twenty trillion, nine hundred forty-six billion, seven hundred seventy-eight million, nine hundred fifty-one thousand, five hundred seven".