812749368915511 has 2 divisors, whose sum is σ = 812749368915512. Its totient is φ = 812749368915510.

The previous prime is 812749368915457. The next prime is 812749368915563. The reversal of 812749368915511 is 115519863947218.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 812749368915511 - 2¹⁷ = 812749368784439 is a prime.

It is a super-2 number, since 2×812749368915511² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812749368945511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406374684457755 + 406374684457756.

It is an arithmetic number, because the mean of its divisors is an integer number (406374684457756).

Almost surely, 2^{812749368915511} is an apocalyptic number.

812749368915511 is a deficient number, since it is larger than the sum of its proper divisors (1).

812749368915511 is an equidigital number, since it uses as much as digits as its factorization.

812749368915511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 130636800, while the sum is 70.

The spelling of 812749368915511 in words is "eight hundred twelve trillion, seven hundred forty-nine billion, three hundred sixty-eight million, nine hundred fifteen thousand, five hundred eleven".