78564226093 has 2 divisors, whose sum is σ = 78564226094. Its totient is φ = 78564226092.

The previous prime is 78564226087. The next prime is 78564226123. The reversal of 78564226093 is 39062246587.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69549293284 + 9014932809 = 263722^2 + 94947^2 .

It is a cyclic number.

It is not a de Polignac number, because 78564226093 - 2⁹ = 78564225581 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78564226093.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78564226193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39282113046 + 39282113047.

It is an arithmetic number, because the mean of its divisors is an integer number (39282113047).

Almost surely, 2^78564226093 is an apocalyptic number.

It is an amenable number.

78564226093 is a deficient number, since it is larger than the sum of its proper divisors (1).

78564226093 is an equidigital number, since it uses as much as digits as its factorization.

78564226093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4354560, while the sum is 52.

The spelling of 78564226093 in words is "seventy-eight billion, five hundred sixty-four million, two hundred twenty-six thousand, ninety-three".