878415068645 has 8 divisors (see below), whose sum is σ = 1055031745560. Its totient is φ = 702109612800.

The previous prime is 878415068623. The next prime is 878415068651. The reversal of 878415068645 is 546860514878.

It is a Cunningham number, because it is equal to 937238²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 878415068644 = 1^2 + 937238^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 878415068645 - 2⁸ = 878415068389 is a prime.

It is a super-3 number, since 3×878415068645³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77799056 + ... + 77810345.

It is an arithmetic number, because the mean of its divisors is an integer number (131878968195).

Almost surely, 2^878415068645 is an apocalyptic number.

It is an amenable number.

878415068645 is a deficient number, since it is larger than the sum of its proper divisors (176616676915).

878415068645 is a wasteful number, since it uses less digits than its factorization.

878415068645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155610535.

The product of its (nonzero) digits is 51609600, while the sum is 62.

The spelling of 878415068645 in words is "eight hundred seventy-eight billion, four hundred fifteen million, sixty-eight thousand, six hundred forty-five".