478382362698217 has 2 divisors, whose sum is σ = 478382362698218. Its totient is φ = 478382362698216.

The previous prime is 478382362698179. The next prime is 478382362698287. The reversal of 478382362698217 is 712896263283874.

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., 464525386228201 + 13856976470016 = 21552851^2 + 3722496^2 .

It is a cyclic number.

It is not a de Polignac number, because 478382362698217 - 2²³ = 478382354309609 is a prime.

It is a super-2 number, since 2×478382362698217² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (478382362698287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239191181349108 + 239191181349109.

It is an arithmetic number, because the mean of its divisors is an integer number (239191181349109).

Almost surely, 2^{478382362698217} is an apocalyptic number.

It is an amenable number.

478382362698217 is a deficient number, since it is larger than the sum of its proper divisors (1).

478382362698217 is an equidigital number, since it uses as much as digits as its factorization.

478382362698217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2341011456, while the sum is 76.

The spelling of 478382362698217 in words is "four hundred seventy-eight trillion, three hundred eighty-two billion, three hundred sixty-two million, six hundred ninety-eight thousand, two hundred seventeen".