478640728127 has 2 divisors, whose sum is σ = 478640728128. Its totient is φ = 478640728126.

The previous prime is 478640728081. The next prime is 478640728129. The reversal of 478640728127 is 721827046874.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 478640728127 - 2²⁴ = 478623950911 is a prime.

Together with 478640728129, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478640728129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239320364063 + 239320364064.

It is an arithmetic number, because the mean of its divisors is an integer number (239320364064).

Almost surely, 2^478640728127 is an apocalyptic number.

478640728127 is a deficient number, since it is larger than the sum of its proper divisors (1).

478640728127 is an equidigital number, since it uses as much as digits as its factorization.

478640728127 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8429568, while the sum is 56.

The spelling of 478640728127 in words is "four hundred seventy-eight billion, six hundred forty million, seven hundred twenty-eight thousand, one hundred twenty-seven".