509669663451149 has 2 divisors, whose sum is σ = 509669663451150. Its totient is φ = 509669663451148.

The previous prime is 509669663451077. The next prime is 509669663451173. The reversal of 509669663451149 is 941154366966905.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 334639885717225 + 175029777733924 = 18293165^2 + 13229882^2 .

It is a cyclic number.

It is not a de Polignac number, because 509669663451149 - 2¹⁶ = 509669663385613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (509669563451149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254834831725574 + 254834831725575.

It is an arithmetic number, because the mean of its divisors is an integer number (254834831725575).

Almost surely, 2^{509669663451149} is an apocalyptic number.

It is an amenable number.

509669663451149 is a deficient number, since it is larger than the sum of its proper divisors (1).

509669663451149 is an equidigital number, since it uses as much as digits as its factorization.

509669663451149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1133740800, while the sum is 74.

The spelling of 509669663451149 in words is "five hundred nine trillion, six hundred sixty-nine billion, six hundred sixty-three million, four hundred fifty-one thousand, one hundred forty-nine".