878642936441 has 2 divisors, whose sum is σ = 878642936442. Its totient is φ = 878642936440.

The previous prime is 878642936411. The next prime is 878642936453. The reversal of 878642936441 is 144639246878.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 548753526841 + 329889409600 = 740779^2 + 574360^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-878642936441 is a prime.

It is not a weakly prime, because it can be changed into another prime (878642936411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439321468220 + 439321468221.

It is an arithmetic number, because the mean of its divisors is an integer number (439321468221).

Almost surely, 2^878642936441 is an apocalyptic number.

It is an amenable number.

878642936441 is a deficient number, since it is larger than the sum of its proper divisors (1).

878642936441 is an equidigital number, since it uses as much as digits as its factorization.

878642936441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55738368, while the sum is 62.

The spelling of 878642936441 in words is "eight hundred seventy-eight billion, six hundred forty-two million, nine hundred thirty-six thousand, four hundred forty-one".