78386612229 has 6 divisors (see below), whose sum is σ = 113225106566. Its totient is φ = 52257741480.

The previous prime is 78386612209. The next prime is 78386612237. The reversal of 78386612229 is 92221668387.

It can be written as a sum of positive squares in only one way, i.e., 49824936225 + 28561676004 = 223215^2 + 169002^2 .

It is not a de Polignac number, because 78386612229 - 2⁵ = 78386612197 is a prime.

It is a super-2 number, since 2×78386612229² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78386612209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4354811782 + ... + 4354811799.

Almost surely, 2^78386612229 is an apocalyptic number.

It is an amenable number.

78386612229 is a deficient number, since it is larger than the sum of its proper divisors (34838494337).

78386612229 is a wasteful number, since it uses less digits than its factorization.

78386612229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8709623587 (or 8709623584 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The spelling of 78386612229 in words is "seventy-eight billion, three hundred eighty-six million, six hundred twelve thousand, two hundred twenty-nine".