816725674281 has 48 divisors (see below), whose sum is σ = 1214463559680. Its totient is φ = 487756130400.

The previous prime is 816725674253. The next prime is 816725674309. The reversal of 816725674281 is 182476527618.

It is an interprime number because it is at equal distance from previous prime (816725674253) and next prime (816725674309).

It is not a de Polignac number, because 816725674281 - 2⁶ = 816725674217 is a prime.

It is a super-2 number, since 2×816725674281² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (816725674231) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 56152096 + ... + 56166638.

It is an arithmetic number, because the mean of its divisors is an integer number (25301324160).

Almost surely, 2^816725674281 is an apocalyptic number.

It is an amenable number.

816725674281 is a deficient number, since it is larger than the sum of its proper divisors (397737885399).

816725674281 is a wasteful number, since it uses less digits than its factorization.

816725674281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16818 (or 16807 counting only the distinct ones).

The product of its digits is 9031680, while the sum is 57.

The spelling of 816725674281 in words is "eight hundred sixteen billion, seven hundred twenty-five million, six hundred seventy-four thousand, two hundred eighty-one".