78814308659 has 4 divisors (see below), whose sum is σ = 79022262360. Its totient is φ = 78606354960.

The previous prime is 78814308653. The next prime is 78814308691. The reversal of 78814308659 is 95680341887.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78814308659 - 2¹² = 78814304563 is a prime.

It is a super-2 number, since 2×78814308659² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78814308598 and 78814308607.

It is not an unprimeable number, because it can be changed into a prime (78814308653) 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 3 ways as a sum of consecutive naturals, for example, 103976282 + ... + 103977039.

It is an arithmetic number, because the mean of its divisors is an integer number (19755565590).

Almost surely, 2^78814308659 is an apocalyptic number.

78814308659 is a deficient number, since it is larger than the sum of its proper divisors (207953701).

78814308659 is a wasteful number, since it uses less digits than its factorization.

78814308659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207953700.

The product of its (nonzero) digits is 11612160, while the sum is 59.

The spelling of 78814308659 in words is "seventy-eight billion, eight hundred fourteen million, three hundred eight thousand, six hundred fifty-nine".