478688251169 has 2 divisors, whose sum is σ = 478688251170. Its totient is φ = 478688251168.

The previous prime is 478688251133. The next prime is 478688251189. The reversal of 478688251169 is 961152886874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 292161870400 + 186526380769 = 540520^2 + 431887^2 .

It is a cyclic number.

It is not a de Polignac number, because 478688251169 - 2²⁰ = 478687202593 is a prime.

It is a super-2 number, since 2×478688251169² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (478688251189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239344125584 + 239344125585.

It is an arithmetic number, because the mean of its divisors is an integer number (239344125585).

Almost surely, 2^478688251169 is an apocalyptic number.

It is an amenable number.

478688251169 is a deficient number, since it is larger than the sum of its proper divisors (1).

478688251169 is an equidigital number, since it uses as much as digits as its factorization.

478688251169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46448640, while the sum is 65.

The spelling of 478688251169 in words is "four hundred seventy-eight billion, six hundred eighty-eight million, two hundred fifty-one thousand, one hundred sixty-nine".