78788192993 has 4 divisors (see below), whose sum is σ = 79964136240. Its totient is φ = 77612249748.

The previous prime is 78788192953. The next prime is 78788193067. The reversal of 78788192993 is 39929188787.

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 78788192993 - 2²⁰ = 78787144417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78788192953) 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, 587971523 + ... + 587971656.

It is an arithmetic number, because the mean of its divisors is an integer number (19991034060).

Almost surely, 2^78788192993 is an apocalyptic number.

It is an amenable number.

78788192993 is a deficient number, since it is larger than the sum of its proper divisors (1175943247).

78788192993 is a wasteful number, since it uses less digits than its factorization.

78788192993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175943246.

The product of its digits is 109734912, while the sum is 71.

The spelling of 78788192993 in words is "seventy-eight billion, seven hundred eighty-eight million, one hundred ninety-two thousand, nine hundred ninety-three".