811832001641 has 2 divisors, whose sum is σ = 811832001642. Its totient is φ = 811832001640.

The previous prime is 811832001623. The next prime is 811832001671. The reversal of 811832001641 is 146100238118.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 678639849616 + 133192152025 = 823796^2 + 364955^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-811832001641 is a prime.

It is not a weakly prime, because it can be changed into another prime (811832001611) 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, 405916000820 + 405916000821.

It is an arithmetic number, because the mean of its divisors is an integer number (405916000821).

Almost surely, 2^811832001641 is an apocalyptic number.

It is an amenable number.

811832001641 is a deficient number, since it is larger than the sum of its proper divisors (1).

811832001641 is an equidigital number, since it uses as much as digits as its factorization.

811832001641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 35.

Adding to 811832001641 its reverse (146100238118), we get a palindrome (957932239759).

The spelling of 811832001641 in words is "eight hundred eleven billion, eight hundred thirty-two million, one thousand, six hundred forty-one".