78829865369 has 4 divisors (see below), whose sum is σ = 80663118096. Its totient is φ = 76996612644.

The previous prime is 78829865341. The next prime is 78829865407. The reversal of 78829865369 is 96356892887.

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 78829865369 - 2³⁶ = 10110388633 is a prime.

It is a super-2 number, since 2×78829865369² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78829862369) 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, 916626299 + ... + 916626384.

It is an arithmetic number, because the mean of its divisors is an integer number (20165779524).

Almost surely, 2^78829865369 is an apocalyptic number.

It is an amenable number.

78829865369 is a deficient number, since it is larger than the sum of its proper divisors (1833252727).

78829865369 is a wasteful number, since it uses less digits than its factorization.

78829865369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1833252726.

The product of its digits is 313528320, while the sum is 71.

The spelling of 78829865369 in words is "seventy-eight billion, eight hundred twenty-nine million, eight hundred sixty-five thousand, three hundred sixty-nine".