513338461849 has 4 divisors (see below), whose sum is σ = 525858912180. Its totient is φ = 500818011520.

The previous prime is 513338461843. The next prime is 513338461873. The reversal of 513338461849 is 948164833315.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 191991196224 + 321347265625 = 438168^2 + 566875^2 .

It is a cyclic number.

It is not a de Polignac number, because 513338461849 - 2⁷ = 513338461721 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 513338461849.

It is not an unprimeable number, because it can be changed into a prime (513338461843) 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, 6260225104 + ... + 6260225185.

It is an arithmetic number, because the mean of its divisors is an integer number (131464728045).

Almost surely, 2^513338461849 is an apocalyptic number.

It is an amenable number.

513338461849 is a deficient number, since it is larger than the sum of its proper divisors (12520450331).

513338461849 is a wasteful number, since it uses less digits than its factorization.

513338461849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12520450330.

The product of its digits is 7464960, while the sum is 55.

The spelling of 513338461849 in words is "five hundred thirteen billion, three hundred thirty-eight million, four hundred sixty-one thousand, eight hundred forty-nine".