78379774189 has 8 divisors (see below), whose sum is σ = 78883455488. Its totient is φ = 77877670320.

The previous prime is 78379774181. The next prime is 78379774199. The reversal of 78379774189 is 98147797387.

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 78379774189 - 2³ = 78379774181 is a prime.

It is a super-2 number, since 2×78379774189² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78379774181) 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, 294582 + ... + 493495.

It is an arithmetic number, because the mean of its divisors is an integer number (9860431936).

Almost surely, 2^78379774189 is an apocalyptic number.

It is an amenable number.

78379774189 is a deficient number, since it is larger than the sum of its proper divisors (503681299).

78379774189 is a wasteful number, since it uses less digits than its factorization.

78379774189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788715.

The product of its digits is 149361408, while the sum is 70.

The spelling of 78379774189 in words is "seventy-eight billion, three hundred seventy-nine million, seven hundred seventy-four thousand, one hundred eighty-nine".