878542491331 has 2 divisors, whose sum is σ = 878542491332. Its totient is φ = 878542491330.

The previous prime is 878542491317. The next prime is 878542491389. The reversal of 878542491331 is 133194245878.

878542491331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-878542491331 is a prime.

It is a super-2 number, since 2×878542491331² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (878542491301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439271245665 + 439271245666.

It is an arithmetic number, because the mean of its divisors is an integer number (439271245666).

Almost surely, 2^878542491331 is an apocalyptic number.

878542491331 is a deficient number, since it is larger than the sum of its proper divisors (1).

878542491331 is an equidigital number, since it uses as much as digits as its factorization.

878542491331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5806080, while the sum is 55.

The spelling of 878542491331 in words is "eight hundred seventy-eight billion, five hundred forty-two million, four hundred ninety-one thousand, three hundred thirty-one".