478823469139 has 4 divisors (see below), whose sum is σ = 478873675080. Its totient is φ = 478773263200.

The previous prime is 478823469079. The next prime is 478823469149. The reversal of 478823469139 is 931964328874.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 478823469139 - 2⁷ = 478823469011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (478823469149) 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, 25088662 + ... + 25107739.

It is an arithmetic number, because the mean of its divisors is an integer number (119718418770).

Almost surely, 2^478823469139 is an apocalyptic number.

478823469139 is a deficient number, since it is larger than the sum of its proper divisors (50205941).

478823469139 is an equidigital number, since it uses as much as digits as its factorization.

478823469139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50205940.

The product of its digits is 62705664, while the sum is 64.

The spelling of 478823469139 in words is "four hundred seventy-eight billion, eight hundred twenty-three million, four hundred sixty-nine thousand, one hundred thirty-nine".