811545520327 has 2 divisors, whose sum is σ = 811545520328. Its totient is φ = 811545520326.

The previous prime is 811545520241. The next prime is 811545520333. The reversal of 811545520327 is 723025545118.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 811545520327 - 2¹⁹ = 811544996039 is a prime.

It is a super-2 number, since 2×811545520327² (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 (811545520427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405772760163 + 405772760164.

It is an arithmetic number, because the mean of its divisors is an integer number (405772760164).

Almost surely, 2^811545520327 is an apocalyptic number.

811545520327 is a deficient number, since it is larger than the sum of its proper divisors (1).

811545520327 is an equidigital number, since it uses as much as digits as its factorization.

811545520327 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336000, while the sum is 43.

The spelling of 811545520327 in words is "eight hundred eleven billion, five hundred forty-five million, five hundred twenty thousand, three hundred twenty-seven".