878346049589 has 2 divisors, whose sum is σ = 878346049590. Its totient is φ = 878346049588.

The previous prime is 878346049583. The next prime is 878346049649. The reversal of 878346049589 is 985940643878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 824227936900 + 54118112689 = 907870^2 + 232633^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-878346049589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878346049583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439173024794 + 439173024795.

It is an arithmetic number, because the mean of its divisors is an integer number (439173024795).

Almost surely, 2^878346049589 is an apocalyptic number.

It is an amenable number.

878346049589 is a deficient number, since it is larger than the sum of its proper divisors (1).

878346049589 is an equidigital number, since it uses as much as digits as its factorization.

878346049589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 418037760, while the sum is 71.

The spelling of 878346049589 in words is "eight hundred seventy-eight billion, three hundred forty-six million, forty-nine thousand, five hundred eighty-nine".