320046147991 has 2 divisors, whose sum is σ = 320046147992. Its totient is φ = 320046147990.

The previous prime is 320046147973. The next prime is 320046148069. The reversal of 320046147991 is 199741640023.

It is a weak prime.

It is an emirp because it is prime and its reverse (199741640023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320046147991 - 2¹⁷ = 320046016919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320046147961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160023073995 + 160023073996.

It is an arithmetic number, because the mean of its divisors is an integer number (160023073996).

Almost surely, 2^320046147991 is an apocalyptic number.

320046147991 is a deficient number, since it is larger than the sum of its proper divisors (1).

320046147991 is an equidigital number, since it uses as much as digits as its factorization.

320046147991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 46.

The spelling of 320046147991 in words is "three hundred twenty billion, forty-six million, one hundred forty-seven thousand, nine hundred ninety-one".