878881818145 has 4 divisors (see below), whose sum is σ = 1054658181780. Its totient is φ = 703105454512.

The previous prime is 878881818083. The next prime is 878881818169. The reversal of 878881818145 is 541818188878.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 537349107681 + 341532710464 = 733041^2 + 584408^2 .

It is a cyclic number.

It is not a de Polignac number, because 878881818145 - 2²¹ = 878879720993 is a prime.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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, 87888181810 + ... + 87888181819.

It is an arithmetic number, because the mean of its divisors is an integer number (263664545445).

Almost surely, 2^878881818145 is an apocalyptic number.

It is an amenable number.

878881818145 is a deficient number, since it is larger than the sum of its proper divisors (175776363635).

878881818145 is a wasteful number, since it uses less digits than its factorization.

878881818145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175776363634.

The product of its digits is 36700160, while the sum is 67.

The spelling of 878881818145 in words is "eight hundred seventy-eight billion, eight hundred eighty-one million, eight hundred eighteen thousand, one hundred forty-five".