870643521805648 has 20 divisors (see below), whose sum is σ = 1722762713361600. Its totient is φ = 426059595776864.

The previous prime is 870643521805619. The next prime is 870643521805709. The reversal of 870643521805648 is 846508125346078.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 578885319598 + ... + 578885321101.

It is an arithmetic number, because the mean of its divisors is an integer number (86138135668080).

Almost surely, 2^{870643521805648} is an apocalyptic number.

It is an amenable number.

870643521805648 is a deficient number, since it is larger than the sum of its proper divisors (852119191555952).

870643521805648 is a wasteful number, since it uses less digits than its factorization.

870643521805648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157770640754 (or 1157770640748 counting only the distinct ones).

The product of its (nonzero) digits is 309657600, while the sum is 67.

The spelling of 870643521805648 in words is "eight hundred seventy trillion, six hundred forty-three billion, five hundred twenty-one million, eight hundred five thousand, six hundred forty-eight".