78344395241 has 6 divisors (see below), whose sum is σ = 91135316970. Its totient is φ = 67152338736.

The previous prime is 78344395223. The next prime is 78344395249. The reversal of 78344395241 is 14259344387.

It can be written as a sum of positive squares in only one way, i.e., 41004630016 + 37339765225 = 202496^2 + 193235^2 .

It is not a de Polignac number, because 78344395241 - 2²² = 78340200937 is a prime.

It is a super-2 number, since 2×78344395241² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78344395241.

It is not an unprimeable number, because it can be changed into a prime (78344395249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 799432556 + ... + 799432653.

It is an arithmetic number, because the mean of its divisors is an integer number (15189219495).

Almost surely, 2^78344395241 is an apocalyptic number.

It is an amenable number.

78344395241 is a deficient number, since it is larger than the sum of its proper divisors (12790921729).

78344395241 is a wasteful number, since it uses less digits than its factorization.

78344395241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1598865223 (or 1598865216 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 50.

The spelling of 78344395241 in words is "seventy-eight billion, three hundred forty-four million, three hundred ninety-five thousand, two hundred forty-one".