816725674253 has 2 divisors, whose sum is σ = 816725674254. Its totient is φ = 816725674252.

The previous prime is 816725674231. The next prime is 816725674309. The reversal of 816725674253 is 352476527618.

It is an a-pointer prime, because the next prime (816725674309) can be obtained adding 816725674253 to its sum of digits (56).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 446869521289 + 369856152964 = 668483^2 + 608158^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-816725674253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (816725634253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408362837126 + 408362837127.

It is an arithmetic number, because the mean of its divisors is an integer number (408362837127).

Almost surely, 2^816725674253 is an apocalyptic number.

It is an amenable number.

816725674253 is a deficient number, since it is larger than the sum of its proper divisors (1).

816725674253 is an equidigital number, since it uses as much as digits as its factorization.

816725674253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16934400, while the sum is 56.

The spelling of 816725674253 in words is "eight hundred sixteen billion, seven hundred twenty-five million, six hundred seventy-four thousand, two hundred fifty-three".