427516475509 has 2 divisors, whose sum is σ = 427516475510. Its totient is φ = 427516475508.

The previous prime is 427516475501. The next prime is 427516475537. The reversal of 427516475509 is 905574615724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 425238322609 + 2278152900 = 652103^2 + 47730^2 .

It is a cyclic number.

It is not a de Polignac number, because 427516475509 - 2³ = 427516475501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 427516475509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427516475501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213758237754 + 213758237755.

It is an arithmetic number, because the mean of its divisors is an integer number (213758237755).

Almost surely, 2^427516475509 is an apocalyptic number.

It is an amenable number.

427516475509 is a deficient number, since it is larger than the sum of its proper divisors (1).

427516475509 is an equidigital number, since it uses as much as digits as its factorization.

427516475509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584000, while the sum is 55.

The spelling of 427516475509 in words is "four hundred twenty-seven billion, five hundred sixteen million, four hundred seventy-five thousand, five hundred nine".