816337945847 has 2 divisors, whose sum is σ = 816337945848. Its totient is φ = 816337945846.

The previous prime is 816337945799. The next prime is 816337945883. The reversal of 816337945847 is 748549733618.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 816337945847 - 2⁶ = 816337945783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (816337945447) 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, 408168972923 + 408168972924.

It is an arithmetic number, because the mean of its divisors is an integer number (408168972924).

Almost surely, 2^816337945847 is an apocalyptic number.

816337945847 is a deficient number, since it is larger than the sum of its proper divisors (1).

816337945847 is an equidigital number, since it uses as much as digits as its factorization.

816337945847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 121927680, while the sum is 65.

The spelling of 816337945847 in words is "eight hundred sixteen billion, three hundred thirty-seven million, nine hundred forty-five thousand, eight hundred forty-seven".