864673174549 has 2 divisors, whose sum is σ = 864673174550. Its totient is φ = 864673174548.

The previous prime is 864673174537. The next prime is 864673174559. The reversal of 864673174549 is 945471376468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 715051198449 + 149621976100 = 845607^2 + 386810^2 .

It is a cyclic number.

It is not a de Polignac number, because 864673174549 - 2⁵ = 864673174517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (864673174529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432336587274 + 432336587275.

It is an arithmetic number, because the mean of its divisors is an integer number (432336587275).

Almost surely, 2^864673174549 is an apocalyptic number.

It is an amenable number.

864673174549 is a deficient number, since it is larger than the sum of its proper divisors (1).

864673174549 is an equidigital number, since it uses as much as digits as its factorization.

864673174549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 121927680, while the sum is 64.

The spelling of 864673174549 in words is "eight hundred sixty-four billion, six hundred seventy-three million, one hundred seventy-four thousand, five hundred forty-nine".