78242367778259 has 8 divisors (see below), whose sum is σ = 78262841136480. Its totient is φ = 78221896998336.

The previous prime is 78242367778241. The next prime is 78242367778303. The reversal of 78242367778259 is 95287776324287.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78242367778259 - 2¹² = 78242367774163 is a prime.

It is a super-2 number, since 2×78242367778259² (a number of 29 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 78242367778259.

It is not an unprimeable number, because it can be changed into a prime (78242367778559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60820769 + ... + 62093885.

It is an arithmetic number, because the mean of its divisors is an integer number (9782855142060).

Almost surely, 2^{78242367778259} is an apocalyptic number.

78242367778259 is a deficient number, since it is larger than the sum of its proper divisors (20473358221).

78242367778259 is a wasteful number, since it uses less digits than its factorization.

78242367778259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289149.

The product of its digits is 3982970880, while the sum is 77.

The spelling of 78242367778259 in words is "seventy-eight trillion, two hundred forty-two billion, three hundred sixty-seven million, seven hundred seventy-eight thousand, two hundred fifty-nine".