78688411819 has 8 divisors (see below), whose sum is σ = 86190147360. Its totient is φ = 71505899136.

The previous prime is 78688411799. The next prime is 78688411829. The reversal of 78688411819 is 91811488687.

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 78688411819 - 2⁵ = 78688411787 is a prime.

It is a super-2 number, since 2×78688411819² (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 (78688411829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79805199 + ... + 79806184.

It is an arithmetic number, because the mean of its divisors is an integer number (10773768420).

Almost surely, 2^78688411819 is an apocalyptic number.

78688411819 is a deficient number, since it is larger than the sum of its proper divisors (7501735541).

78688411819 is a wasteful number, since it uses less digits than its factorization.

78688411819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159611429.

The product of its digits is 6193152, while the sum is 61.

The spelling of 78688411819 in words is "seventy-eight billion, six hundred eighty-eight million, four hundred eleven thousand, eight hundred nineteen".