78860318669 has 4 divisors (see below), whose sum is σ = 86029438560. Its totient is φ = 71691198780.

The previous prime is 78860318617. The next prime is 78860318671. The reversal of 78860318669 is 96681306887.

It is a happy number.

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 78860318669 - 2⁸ = 78860318413 is a prime.

It is a super-4 number, since 4×78860318669⁴ (a number of 45 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78860318609) 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, 3584559929 + ... + 3584559950.

It is an arithmetic number, because the mean of its divisors is an integer number (21507359640).

Almost surely, 2^78860318669 is an apocalyptic number.

It is an amenable number.

78860318669 is a deficient number, since it is larger than the sum of its proper divisors (7169119891).

78860318669 is a wasteful number, since it uses less digits than its factorization.

78860318669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7169119890.

The product of its (nonzero) digits is 20901888, while the sum is 62.

The spelling of 78860318669 in words is "seventy-eight billion, eight hundred sixty million, three hundred eighteen thousand, six hundred sixty-nine".