478642760173 has 2 divisors, whose sum is σ = 478642760174. Its totient is φ = 478642760172.

The previous prime is 478642760153. The next prime is 478642760201. The reversal of 478642760173 is 371067246874.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 298304945929 + 180337814244 = 546173^2 + 424662^2 .

It is a cyclic number.

It is not a de Polignac number, because 478642760173 - 2³⁷ = 341203806701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478642760153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239321380086 + 239321380087.

It is an arithmetic number, because the mean of its divisors is an integer number (239321380087).

Almost surely, 2^478642760173 is an apocalyptic number.

It is an amenable number.

478642760173 is a deficient number, since it is larger than the sum of its proper divisors (1).

478642760173 is an equidigital number, since it uses as much as digits as its factorization.

478642760173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9483264, while the sum is 55.

The spelling of 478642760173 in words is "four hundred seventy-eight billion, six hundred forty-two million, seven hundred sixty thousand, one hundred seventy-three".