878415068644 has 9 divisors (see below), whose sum is σ = 1537229650467. Its totient is φ = 439206597084.

The previous prime is 878415068623. The next prime is 878415068651. The reversal of 878415068644 is 446860514878.

The square root of 878415068644 is 937238.

It is a perfect power (a square), and thus also a powerful number.

It is a super-3 number, since 3×878415068644³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1640167 + ... + 2108785.

Almost surely, 2^878415068644 is an apocalyptic number.

878415068644 is the 937238-th square number.

It is an amenable number.

878415068644 is a deficient number, since it is larger than the sum of its proper divisors (658814581823).

878415068644 is an frugal number, since it uses more digits than its factorization.

878415068644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937242 (or 468621 counting only the distinct ones).

The product of its (nonzero) digits is 41287680, while the sum is 61.

The spelling of 878415068644 in words is "eight hundred seventy-eight billion, four hundred fifteen million, sixty-eight thousand, six hundred forty-four".