878767676581 has 2 divisors, whose sum is σ = 878767676582. Its totient is φ = 878767676580.

The previous prime is 878767676543. The next prime is 878767676597. The reversal of 878767676581 is 185676767878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 869248552225 + 9519124356 = 932335^2 + 97566^2 .

It is a cyclic number.

It is not a de Polignac number, because 878767676581 - 2¹⁵ = 878767643813 is a prime.

It is a super-2 number, since 2×878767676581² (a number of 25 digits) contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 878767676498 and 878767676507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878767676081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439383838290 + 439383838291.

It is an arithmetic number, because the mean of its divisors is an integer number (439383838291).

Almost surely, 2^878767676581 is an apocalyptic number.

It is an amenable number.

878767676581 is a deficient number, since it is larger than the sum of its proper divisors (1).

878767676581 is an equidigital number, since it uses as much as digits as its factorization.

878767676581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1327656960, while the sum is 76.

The spelling of 878767676581 in words is "eight hundred seventy-eight billion, seven hundred sixty-seven million, six hundred seventy-six thousand, five hundred eighty-one".