78242344746349 has 4 divisors (see below), whose sum is σ = 89419822567264. Its totient is φ = 67064866925436.

The previous prime is 78242344746337. The next prime is 78242344746353. The reversal of 78242344746349 is 94364744324287.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78242344746349 - 2¹⁵ = 78242344713581 is a prime.

It is a super-2 number, since 2×78242344746349² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78242344746149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5588738910447 + ... + 5588738910460.

It is an arithmetic number, because the mean of its divisors is an integer number (22354955641816).

Almost surely, 2^{78242344746349} is an apocalyptic number.

It is an amenable number.

78242344746349 is a deficient number, since it is larger than the sum of its proper divisors (11177477820915).

78242344746349 is a wasteful number, since it uses less digits than its factorization.

78242344746349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11177477820914.

The product of its digits is 780337152, while the sum is 67.

The spelling of 78242344746349 in words is "seventy-eight trillion, two hundred forty-two billion, three hundred forty-four million, seven hundred forty-six thousand, three hundred forty-nine".