478776266869 has 2 divisors, whose sum is σ = 478776266870. Its totient is φ = 478776266868.

The previous prime is 478776266851. The next prime is 478776266909. The reversal of 478776266869 is 968662677874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 414291759025 + 64484507844 = 643655^2 + 253938^2 .

It is a cyclic number.

It is not a de Polignac number, because 478776266869 - 2¹⁷ = 478776135797 is a prime.

It is a super-2 number, since 2×478776266869² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 478776266795 and 478776266804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478776266819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239388133434 + 239388133435.

It is an arithmetic number, because the mean of its divisors is an integer number (239388133435).

Almost surely, 2^478776266869 is an apocalyptic number.

It is an amenable number.

478776266869 is a deficient number, since it is larger than the sum of its proper divisors (1).

478776266869 is an equidigital number, since it uses as much as digits as its factorization.

478776266869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2048385024, while the sum is 76.

The spelling of 478776266869 in words is "four hundred seventy-eight billion, seven hundred seventy-six million, two hundred sixty-six thousand, eight hundred sixty-nine".