478810681939 has 8 divisors (see below), whose sum is σ = 494265663360. Its totient is φ = 463356292800.

The previous prime is 478810681913. The next prime is 478810681957. The reversal of 478810681939 is 939186018874.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478810681939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (478810687939) 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, 1980999 + ... + 2209519.

It is an arithmetic number, because the mean of its divisors is an integer number (61783207920).

Almost surely, 2^478810681939 is an apocalyptic number.

478810681939 is a deficient number, since it is larger than the sum of its proper divisors (15454981421).

478810681939 is a wasteful number, since it uses less digits than its factorization.

478810681939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296141.

The product of its (nonzero) digits is 20901888, while the sum is 64.

The spelling of 478810681939 in words is "four hundred seventy-eight billion, eight hundred ten million, six hundred eighty-one thousand, nine hundred thirty-nine".