812265847311631 has 2 divisors, whose sum is σ = 812265847311632. Its totient is φ = 812265847311630.

The previous prime is 812265847311587. The next prime is 812265847311661. The reversal of 812265847311631 is 136113748562218.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 812265847311631 - 2²³ = 812265838923023 is a prime.

It is a super-2 number, since 2×812265847311631² (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 (812265847311661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406132923655815 + 406132923655816.

It is an arithmetic number, because the mean of its divisors is an integer number (406132923655816).

Almost surely, 2^{812265847311631} is an apocalyptic number.

812265847311631 is a deficient number, since it is larger than the sum of its proper divisors (1).

812265847311631 is an equidigital number, since it uses as much as digits as its factorization.

812265847311631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11612160, while the sum is 58.

The spelling of 812265847311631 in words is "eight hundred twelve trillion, two hundred sixty-five billion, eight hundred forty-seven million, three hundred eleven thousand, six hundred thirty-one".