78884306635571 has 2 divisors, whose sum is σ = 78884306635572. Its totient is φ = 78884306635570.

The previous prime is 78884306635513. The next prime is 78884306635621. The reversal of 78884306635571 is 17553660348887.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78884306635571 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78884306635495 and 78884306635504.

It is not a weakly prime, because it can be changed into another prime (78884306605571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39442153317785 + 39442153317786.

It is an arithmetic number, because the mean of its divisors is an integer number (39442153317786).

Almost surely, 2^{78884306635571} is an apocalyptic number.

78884306635571 is a deficient number, since it is larger than the sum of its proper divisors (1).

78884306635571 is an equidigital number, since it uses as much as digits as its factorization.

78884306635571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 812851200, while the sum is 71.

The spelling of 78884306635571 in words is "seventy-eight trillion, eight hundred eighty-four billion, three hundred six million, six hundred thirty-five thousand, five hundred seventy-one".