513553675657 has 4 divisors (see below), whose sum is σ = 560240373456. Its totient is φ = 466866977860.

The previous prime is 513553675651. The next prime is 513553675667. The reversal of 513553675657 is 756576355315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-513553675657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513553675651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23343348883 + ... + 23343348904.

It is an arithmetic number, because the mean of its divisors is an integer number (140060093364).

Almost surely, 2^513553675657 is an apocalyptic number.

It is an amenable number.

513553675657 is a deficient number, since it is larger than the sum of its proper divisors (46686697799).

513553675657 is a wasteful number, since it uses less digits than its factorization.

513553675657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46686697798.

The product of its digits is 49612500, while the sum is 58.

The spelling of 513553675657 in words is "five hundred thirteen billion, five hundred fifty-three million, six hundred seventy-five thousand, six hundred fifty-seven".