861853347675 has 18 divisors (see below), whose sum is σ = 1543675107572. Its totient is φ = 459655118640.

The previous prime is 861853347653. The next prime is 861853347703. The reversal of 861853347675 is 576743358168.

It is a happy number.

861853347675 is a `hidden beast` number, since 8 + 61 + 8 + 5 + 33 + 476 + 75 = 666.

It is not a de Polignac number, because 861853347675 - 2⁹ = 861853347163 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1915229437 + ... + 1915229886.

Almost surely, 2^861853347675 is an apocalyptic number.

861853347675 is a deficient number, since it is larger than the sum of its proper divisors (681821759897).

861853347675 is a wasteful number, since it uses less digits than its factorization.

861853347675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3830459339 (or 3830459331 counting only the distinct ones).

The product of its digits is 101606400, while the sum is 63.

The spelling of 861853347675 in words is "eight hundred sixty-one billion, eight hundred fifty-three million, three hundred forty-seven thousand, six hundred seventy-five".