478823507189 has 4 divisors (see below), whose sum is σ = 485567500320. Its totient is φ = 472079514060.

The previous prime is 478823507179. The next prime is 478823507213. The reversal of 478823507189 is 981705328874.

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 a de Polignac number, because none of the positive numbers 2^k-478823507189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478823507179) 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, 3371996459 + ... + 3371996600.

It is an arithmetic number, because the mean of its divisors is an integer number (121391875080).

Almost surely, 2^478823507189 is an apocalyptic number.

It is an amenable number.

478823507189 is a deficient number, since it is larger than the sum of its proper divisors (6743993131).

478823507189 is an equidigital number, since it uses as much as digits as its factorization.

478823507189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6743993130.

The product of its (nonzero) digits is 27095040, while the sum is 62.

The spelling of 478823507189 in words is "four hundred seventy-eight billion, eight hundred twenty-three million, five hundred seven thousand, one hundred eighty-nine".