78385682241 has 6 divisors (see below), whose sum is σ = 113223763250. Its totient is φ = 52257121488.

The previous prime is 78385682239. The next prime is 78385682251. The reversal of 78385682241 is 14228658387.

78385682241 is a `hidden beast` number, since 7 + 8 + 38 + 568 + 2 + 2 + 41 = 666.

It can be written as a sum of positive squares in only one way, i.e., 44140329216 + 34245353025 = 210096^2 + 185055^2 .

It is not a de Polignac number, because 78385682241 - 2¹ = 78385682239 is a prime.

It is a super-2 number, since 2×78385682241² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78385682201) 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 in 5 ways as a sum of consecutive naturals, for example, 4354760116 + ... + 4354760133.

Almost surely, 2^78385682241 is an apocalyptic number.

It is an amenable number.

78385682241 is a deficient number, since it is larger than the sum of its proper divisors (34838081009).

78385682241 is a wasteful number, since it uses less digits than its factorization.

78385682241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8709520255 (or 8709520252 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 54.

The spelling of 78385682241 in words is "seventy-eight billion, three hundred eighty-five million, six hundred eighty-two thousand, two hundred forty-one".