78387638359 has 2 divisors, whose sum is σ = 78387638360. Its totient is φ = 78387638358.

The previous prime is 78387638267. The next prime is 78387638369. The reversal of 78387638359 is 95383678387.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78387638359 - 2⁹ = 78387637847 is a prime.

It is a super-2 number, since 2×78387638359² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78387638294 and 78387638303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78387638369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39193819179 + 39193819180.

It is an arithmetic number, because the mean of its divisors is an integer number (39193819180).

Almost surely, 2^78387638359 is an apocalyptic number.

78387638359 is a deficient number, since it is larger than the sum of its proper divisors (1).

78387638359 is an equidigital number, since it uses as much as digits as its factorization.

78387638359 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 182891520, while the sum is 67.

The spelling of 78387638359 in words is "seventy-eight billion, three hundred eighty-seven million, six hundred thirty-eight thousand, three hundred fifty-nine".