478725597209 has 2 divisors, whose sum is σ = 478725597210. Its totient is φ = 478725597208.

The previous prime is 478725597187. The next prime is 478725597221. The reversal of 478725597209 is 902795527874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 408621385225 + 70104211984 = 639235^2 + 264772^2 .

It is a cyclic number.

It is not a de Polignac number, because 478725597209 - 2²⁰ = 478724548633 is a prime.

It is a super-2 number, since 2×478725597209² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (478725597289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239362798604 + 239362798605.

It is an arithmetic number, because the mean of its divisors is an integer number (239362798605).

Almost surely, 2^478725597209 is an apocalyptic number.

It is an amenable number.

478725597209 is a deficient number, since it is larger than the sum of its proper divisors (1).

478725597209 is an equidigital number, since it uses as much as digits as its factorization.

478725597209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 88905600, while the sum is 65.

The spelling of 478725597209 in words is "four hundred seventy-eight billion, seven hundred twenty-five million, five hundred ninety-seven thousand, two hundred nine".