477724281509 has 2 divisors, whose sum is σ = 477724281510. Its totient is φ = 477724281508.

The previous prime is 477724281469. The next prime is 477724281511. The reversal of 477724281509 is 905182427774.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 476759868484 + 964413025 = 690478^2 + 31055^2 .

It is a cyclic number.

It is not a de Polignac number, because 477724281509 - 2²⁰ = 477723232933 is a prime.

Together with 477724281511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (477724281569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 238862140754 + 238862140755.

It is an arithmetic number, because the mean of its divisors is an integer number (238862140755).

Almost surely, 2^477724281509 is an apocalyptic number.

It is an amenable number.

477724281509 is a deficient number, since it is larger than the sum of its proper divisors (1).

477724281509 is an equidigital number, since it uses as much as digits as its factorization.

477724281509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7902720, while the sum is 56.

The spelling of 477724281509 in words is "four hundred seventy-seven billion, seven hundred twenty-four million, two hundred eighty-one thousand, five hundred nine".