812562403253 has 2 divisors, whose sum is σ = 812562403254. Its totient is φ = 812562403252.

The previous prime is 812562403249. The next prime is 812562403271. The reversal of 812562403253 is 352304265218.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 595948488529 + 216613914724 = 771977^2 + 465418^2 .

It is a cyclic number.

It is not a de Polignac number, because 812562403253 - 2² = 812562403249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 812562403253.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812562403753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406281201626 + 406281201627.

It is an arithmetic number, because the mean of its divisors is an integer number (406281201627).

Almost surely, 2^812562403253 is an apocalyptic number.

It is an amenable number.

812562403253 is a deficient number, since it is larger than the sum of its proper divisors (1).

812562403253 is an equidigital number, since it uses as much as digits as its factorization.

812562403253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 812562403253 in words is "eight hundred twelve billion, five hundred sixty-two million, four hundred three thousand, two hundred fifty-three".