78564009103 has 2 divisors, whose sum is σ = 78564009104. Its totient is φ = 78564009102.

The previous prime is 78564009091. The next prime is 78564009107. The reversal of 78564009103 is 30190046587.

It is a strong prime.

It is an emirp because it is prime and its reverse (30190046587) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78564009103 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78564009103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78564009107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39282004551 + 39282004552.

It is an arithmetic number, because the mean of its divisors is an integer number (39282004552).

Almost surely, 2^78564009103 is an apocalyptic number.

78564009103 is a deficient number, since it is larger than the sum of its proper divisors (1).

78564009103 is an equidigital number, since it uses as much as digits as its factorization.

78564009103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 78564009103 in words is "seventy-eight billion, five hundred sixty-four million, nine thousand, one hundred three".