811465930181 has 2 divisors, whose sum is σ = 811465930182. Its totient is φ = 811465930180.

The previous prime is 811465930159. The next prime is 811465930207. The reversal of 811465930181 is 181039564118.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 765922528900 + 45543401281 = 875170^2 + 213409^2 .

It is a cyclic number.

It is not a de Polignac number, because 811465930181 - 2¹⁸ = 811465668037 is a prime.

It is a super-2 number, since 2×811465930181² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (811465930981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405732965090 + 405732965091.

It is an arithmetic number, because the mean of its divisors is an integer number (405732965091).

Almost surely, 2^811465930181 is an apocalyptic number.

It is an amenable number.

811465930181 is a deficient number, since it is larger than the sum of its proper divisors (1).

811465930181 is an equidigital number, since it uses as much as digits as its factorization.

811465930181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 47.

The spelling of 811465930181 in words is "eight hundred eleven billion, four hundred sixty-five million, nine hundred thirty thousand, one hundred eighty-one".