816957144071 has 2 divisors, whose sum is σ = 816957144072. Its totient is φ = 816957144070.

The previous prime is 816957143987. The next prime is 816957144161. The reversal of 816957144071 is 170441759618.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-816957144071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (816957144571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408478572035 + 408478572036.

It is an arithmetic number, because the mean of its divisors is an integer number (408478572036).

Almost surely, 2^816957144071 is an apocalyptic number.

816957144071 is a deficient number, since it is larger than the sum of its proper divisors (1).

816957144071 is an equidigital number, since it uses as much as digits as its factorization.

816957144071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1693440, while the sum is 53.

The spelling of 816957144071 in words is "eight hundred sixteen billion, nine hundred fifty-seven million, one hundred forty-four thousand, seventy-one".