878168221585076 has 12 divisors (see below), whose sum is σ = 1540343566501572. Its totient is φ = 438070059727488.

The previous prime is 878168221585049. The next prime is 878168221585121. The reversal of 878168221585076 is 670585122861878.

It can be written as a sum of positive squares in 2 ways, for example, as 66559914797476 + 811608306787600 = 8158426^2 + 28488740^2 .

It is a junction number, because it is equal to n+sod(n) for n = 878168221584994 and 878168221585012.

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, 253512764315 + ... + 253512767778.

It is an arithmetic number, because the mean of its divisors is an integer number (128361963875131).

Almost surely, 2^{878168221585076} is an apocalyptic number.

It is an amenable number.

878168221585076 is a deficient number, since it is larger than the sum of its proper divisors (662175344916496).

878168221585076 is a wasteful number, since it uses less digits than its factorization.

878168221585076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507025532530 (or 507025532528 counting only the distinct ones).

The product of its (nonzero) digits is 722534400, while the sum is 74.

The spelling of 878168221585076 in words is "eight hundred seventy-eight trillion, one hundred sixty-eight billion, two hundred twenty-one million, five hundred eighty-five thousand, seventy-six".