509613773477 has 2 divisors, whose sum is σ = 509613773478. Its totient is φ = 509613773476.

The previous prime is 509613773443. The next prime is 509613773479. The reversal of 509613773477 is 774377316905.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 418038540481 + 91575232996 = 646559^2 + 302614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-509613773477 is a prime.

Together with 509613773479, 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 (509613773479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254806886738 + 254806886739.

It is an arithmetic number, because the mean of its divisors is an integer number (254806886739).

Almost surely, 2^509613773477 is an apocalyptic number.

It is an amenable number.

509613773477 is a deficient number, since it is larger than the sum of its proper divisors (1).

509613773477 is an equidigital number, since it uses as much as digits as its factorization.

509613773477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23337720, while the sum is 59.

The spelling of 509613773477 in words is "five hundred nine billion, six hundred thirteen million, seven hundred seventy-three thousand, four hundred seventy-seven".