864119645 has 12 divisors (see below), whose sum is σ = 1065734964. Its totient is φ = 672606720.

The previous prime is 864119527. The next prime is 864119647. The reversal of 864119645 is 546911468.

It can be written as a sum of positive squares in 6 ways, for example, as 10252804 + 853866841 = 3202^2 + 29221^2 .

It is not a de Polignac number, because 864119645 - 2¹⁶ = 864054109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 864119596 and 864119605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864119647) 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, 56276 + ... + 69965.

It is an arithmetic number, because the mean of its divisors is an integer number (88811247).

Almost surely, 2^864119645 is an apocalyptic number.

It is an amenable number.

864119645 is a deficient number, since it is larger than the sum of its proper divisors (201615319).

864119645 is a wasteful number, since it uses less digits than its factorization.

864119645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126320 (or 126283 counting only the distinct ones).

The product of its digits is 207360, while the sum is 44.

The square root of 864119645 is about 29395.9120457250. The cubic root of 864119645 is about 952.4845931792.

The spelling of 864119645 in words is "eight hundred sixty-four million, one hundred nineteen thousand, six hundred forty-five".