8251313394645 has 12 divisors (see below), whose sum is σ = 14302276550796. Its totient is φ = 4400700477120.

The previous prime is 8251313394641. The next prime is 8251313394719. The reversal of 8251313394645 is 5464933131528.

8251313394645 is a `hidden beast` number, since 8 + 2 + 513 + 1 + 33 + 94 + 6 + 4 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6481418414769 + 1769894979876 = 2545863^2 + 1330374^2 .

It is not a de Polignac number, because 8251313394645 - 2² = 8251313394641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8251313394591 and 8251313394600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8251313394641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91681259896 + ... + 91681259985.

It is an arithmetic number, because the mean of its divisors is an integer number (1191856379233).

Almost surely, 2^{8251313394645} is an apocalyptic number.

It is an amenable number.

8251313394645 is a deficient number, since it is larger than the sum of its proper divisors (6050963156151).

8251313394645 is a wasteful number, since it uses less digits than its factorization.

8251313394645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183362519892 (or 183362519889 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 54.

The spelling of 8251313394645 in words is "eight trillion, two hundred fifty-one billion, three hundred thirteen million, three hundred ninety-four thousand, six hundred forty-five".