478148989247 has 4 divisors (see below), whose sum is σ = 498938075760. Its totient is φ = 457359902736.

The previous prime is 478148989243. The next prime is 478148989259. The reversal of 478148989247 is 742989841874.

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 478148989247 - 2² = 478148989243 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 (478148989243) 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, 10394543222 + ... + 10394543267.

It is an arithmetic number, because the mean of its divisors is an integer number (124734518940).

Almost surely, 2^478148989247 is an apocalyptic number.

478148989247 is a deficient number, since it is larger than the sum of its proper divisors (20789086513).

478148989247 is a wasteful number, since it uses less digits than its factorization.

478148989247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20789086512.

The product of its digits is 260112384, while the sum is 71.

The spelling of 478148989247 in words is "four hundred seventy-eight billion, one hundred forty-eight million, nine hundred eighty-nine thousand, two hundred forty-seven".