878514613921 has 16 divisors (see below), whose sum is σ = 1058642006400. Its totient is φ = 712177221888.

The previous prime is 878514613861. The next prime is 878514613979. The reversal of 878514613921 is 129316415878.

It is a cyclic number.

It is not a de Polignac number, because 878514613921 - 2¹³ = 878514605729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (878514613981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5490586 + ... + 5648323.

It is an arithmetic number, because the mean of its divisors is an integer number (66165125400).

Almost surely, 2^878514613921 is an apocalyptic number.

It is an amenable number.

878514613921 is a deficient number, since it is larger than the sum of its proper divisors (180127392479).

878514613921 is a wasteful number, since it uses less digits than its factorization.

878514613921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11139528.

The product of its digits is 2903040, while the sum is 55.

The spelling of 878514613921 in words is "eight hundred seventy-eight billion, five hundred fourteen million, six hundred thirteen thousand, nine hundred twenty-one".