864373187845 has 4 divisors (see below), whose sum is σ = 1037247825420. Its totient is φ = 691498550272.

The previous prime is 864373187831. The next prime is 864373187851. The reversal of 864373187845 is 548781373468.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 303241854276 + 561131333569 = 550674^2 + 749087^2 .

It is a cyclic number.

It is not a de Polignac number, because 864373187845 - 2⁵ = 864373187813 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86437318780 + ... + 86437318789.

It is an arithmetic number, because the mean of its divisors is an integer number (259311956355).

Almost surely, 2^864373187845 is an apocalyptic number.

It is an amenable number.

864373187845 is a deficient number, since it is larger than the sum of its proper divisors (172874637575).

864373187845 is a wasteful number, since it uses less digits than its factorization.

864373187845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172874637574.

The product of its digits is 108380160, while the sum is 64.

The spelling of 864373187845 in words is "eight hundred sixty-four billion, three hundred seventy-three million, one hundred eighty-seven thousand, eight hundred forty-five".