78364002889 has 2 divisors, whose sum is σ = 78364002890. Its totient is φ = 78364002888.

The previous prime is 78364002869. The next prime is 78364002923. The reversal of 78364002889 is 98820046387.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50982027264 + 27381975625 = 225792^2 + 165475^2 .

It is a cyclic number.

It is not a de Polignac number, because 78364002889 - 2⁹ = 78364002377 is a prime.

It is a super-2 number, since 2×78364002889² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78364002869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39182001444 + 39182001445.

It is an arithmetic number, because the mean of its divisors is an integer number (39182001445).

Almost surely, 2^78364002889 is an apocalyptic number.

It is an amenable number.

78364002889 is a deficient number, since it is larger than the sum of its proper divisors (1).

78364002889 is an equidigital number, since it uses as much as digits as its factorization.

78364002889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4644864, while the sum is 55.

The spelling of 78364002889 in words is "seventy-eight billion, three hundred sixty-four million, two thousand, eight hundred eighty-nine".