878750631889 has 9 divisors (see below), whose sum is σ = 951559738353. Its totient is φ = 811143180432.

The previous prime is 878750631851. The next prime is 878750631917. The reversal of 878750631889 is 988136057878.

The square root of 878750631889 is 937417.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 71254294225 + 807496337664 = 266935^2 + 898608^2 .

It is not a de Polignac number, because 878750631889 - 2¹³ = 878750623697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (878750631089) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 12150367 + ... + 12222475.

It is an arithmetic number, because the mean of its divisors is an integer number (105728859817).

Almost surely, 2^878750631889 is an apocalyptic number.

878750631889 is the 937417-th square number.

878750631889 is the 468709-th centered octagonal number.

It is an amenable number.

878750631889 is a deficient number, since it is larger than the sum of its proper divisors (72809106464).

878750631889 is an frugal number, since it uses more digits than its factorization.

878750631889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144244 (or 72122 counting only the distinct ones).

The product of its (nonzero) digits is 162570240, while the sum is 70.

The spelling of 878750631889 in words is "eight hundred seventy-eight billion, seven hundred fifty million, six hundred thirty-one thousand, eight hundred eighty-nine".