78543444229 has 2 divisors, whose sum is σ = 78543444230. Its totient is φ = 78543444228.

The previous prime is 78543444197. The next prime is 78543444247. The reversal of 78543444229 is 92244434587.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74053104129 + 4490340100 = 272127^2 + 67010^2 .

It is a cyclic number.

It is not a de Polignac number, because 78543444229 - 2⁵ = 78543444197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78543454229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39271722114 + 39271722115.

It is an arithmetic number, because the mean of its divisors is an integer number (39271722115).

Almost surely, 2^78543444229 is an apocalyptic number.

It is an amenable number.

78543444229 is a deficient number, since it is larger than the sum of its proper divisors (1).

78543444229 is an equidigital number, since it uses as much as digits as its factorization.

78543444229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7741440, while the sum is 52.

The spelling of 78543444229 in words is "seventy-eight billion, five hundred forty-three million, four hundred forty-four thousand, two hundred twenty-nine".