478531277439 has 4 divisors (see below), whose sum is σ = 638041703256. Its totient is φ = 319020851624.

The previous prime is 478531277401. The next prime is 478531277447. The reversal of 478531277439 is 934772135874.

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 478531277439 - 2⁷ = 478531277311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478531277449) 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, 79755212904 + ... + 79755212909.

It is an arithmetic number, because the mean of its divisors is an integer number (159510425814).

Almost surely, 2^478531277439 is an apocalyptic number.

478531277439 is a deficient number, since it is larger than the sum of its proper divisors (159510425817).

478531277439 is a wasteful number, since it uses less digits than its factorization.

478531277439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159510425816.

The product of its digits is 35562240, while the sum is 60.

The spelling of 478531277439 in words is "four hundred seventy-eight billion, five hundred thirty-one million, two hundred seventy-seven thousand, four hundred thirty-nine".