478255728039 has 4 divisors (see below), whose sum is σ = 637674304056. Its totient is φ = 318837152024.

The previous prime is 478255727987. The next prime is 478255728053. The reversal of 478255728039 is 930827552874.

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 478255728039 - 2⁸ = 478255727783 is a prime.

It is a super-2 number, since 2×478255728039² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478255728059) 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, 79709288004 + ... + 79709288009.

It is an arithmetic number, because the mean of its divisors is an integer number (159418576014).

Almost surely, 2^478255728039 is an apocalyptic number.

478255728039 is a deficient number, since it is larger than the sum of its proper divisors (159418576017).

478255728039 is a wasteful number, since it uses less digits than its factorization.

478255728039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159418576016.

The product of its (nonzero) digits is 33868800, while the sum is 60.

The spelling of 478255728039 in words is "four hundred seventy-eight billion, two hundred fifty-five million, seven hundred twenty-eight thousand, thirty-nine".