878489945769 has 16 divisors (see below), whose sum is σ = 1174793507712. Its totient is φ = 583923614208.

The previous prime is 878489945743. The next prime is 878489945789. The reversal of 878489945769 is 967549984878.

It is not a de Polignac number, because 878489945769 - 2¹² = 878489941673 is a prime.

It is a super-2 number, since 2×878489945769² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 878489945691 and 878489945700.

It is not an unprimeable number, because it can be changed into a prime (878489945719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8598067 + ... + 8699639.

It is an arithmetic number, because the mean of its divisors is an integer number (73424594232).

Almost surely, 2^878489945769 is an apocalyptic number.

It is an amenable number.

878489945769 is a deficient number, since it is larger than the sum of its proper divisors (296303561943).

878489945769 is a wasteful number, since it uses less digits than its factorization.

878489945769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110096.

The product of its digits is 8778792960, while the sum is 84.

The spelling of 878489945769 in words is "eight hundred seventy-eight billion, four hundred eighty-nine million, nine hundred forty-five thousand, seven hundred sixty-nine".