78390573789 has 8 divisors (see below), whose sum is σ = 114022652832. Its totient is φ = 47509438640.

The previous prime is 78390573763. The next prime is 78390573847. The reversal of 78390573789 is 98737509387.

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 78390573789 - 2⁹ = 78390573277 is a prime.

It is a super-2 number, since 2×78390573789² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78390573589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1187735934 + ... + 1187735999.

It is an arithmetic number, because the mean of its divisors is an integer number (14252831604).

Almost surely, 2^78390573789 is an apocalyptic number.

It is an amenable number.

78390573789 is a deficient number, since it is larger than the sum of its proper divisors (35632079043).

78390573789 is a wasteful number, since it uses less digits than its factorization.

78390573789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2375471947.

The product of its (nonzero) digits is 80015040, while the sum is 66.

The spelling of 78390573789 in words is "seventy-eight billion, three hundred ninety million, five hundred seventy-three thousand, seven hundred eighty-nine".