878924969557 has 2 divisors, whose sum is σ = 878924969558. Its totient is φ = 878924969556.

The previous prime is 878924969513. The next prime is 878924969567. The reversal of 878924969557 is 755969429878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 543922475121 + 335002494436 = 737511^2 + 578794^2 .

It is a cyclic number.

It is not a de Polignac number, because 878924969557 - 2³⁹ = 329169155669 is a prime.

It is a super-2 number, since 2×878924969557² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878924969567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439462484778 + 439462484779.

It is an arithmetic number, because the mean of its divisors is an integer number (439462484779).

Almost surely, 2^878924969557 is an apocalyptic number.

It is an amenable number.

878924969557 is a deficient number, since it is larger than the sum of its proper divisors (1).

878924969557 is an equidigital number, since it uses as much as digits as its factorization.

878924969557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2743372800, while the sum is 79.

It can be divided in two parts, 878924 and 969557, that added together give a palindrome (1848481).

The spelling of 878924969557 in words is "eight hundred seventy-eight billion, nine hundred twenty-four million, nine hundred sixty-nine thousand, five hundred fifty-seven".