78887365368589 has 2 divisors, whose sum is σ = 78887365368590. Its totient is φ = 78887365368588.

The previous prime is 78887365368571. The next prime is 78887365368659. The reversal of 78887365368589 is 98586356378887.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59273831102500 + 19613534266089 = 7698950^2 + 4428717^2 .

It is a cyclic number.

It is not a de Polignac number, because 78887365368589 - 2⁵ = 78887365368557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78887365368089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39443682684294 + 39443682684295.

It is an arithmetic number, because the mean of its divisors is an integer number (39443682684295).

Almost surely, 2^{78887365368589} is an apocalyptic number.

It is an amenable number.

78887365368589 is a deficient number, since it is larger than the sum of its proper divisors (1).

78887365368589 is an equidigital number, since it uses as much as digits as its factorization.

78887365368589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 117050572800, while the sum is 91.

The spelling of 78887365368589 in words is "seventy-eight trillion, eight hundred eighty-seven billion, three hundred sixty-five million, three hundred sixty-eight thousand, five hundred eighty-nine".