513696525813 has 6 divisors (see below), whose sum is σ = 742006092854. Its totient is φ = 342464350536.

The previous prime is 513696525809. The next prime is 513696525821. The reversal of 513696525813 is 318525696315.

513696525813 is a `hidden beast` number, since 5 + 1 + 3 + 6 + 9 + 6 + 52 + 581 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 507169016964 + 6527508849 = 712158^2 + 80793^2 .

It is not a de Polignac number, because 513696525813 - 2² = 513696525809 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 513696525813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513696525803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28538695870 + ... + 28538695887.

Almost surely, 2^513696525813 is an apocalyptic number.

It is an amenable number.

513696525813 is a deficient number, since it is larger than the sum of its proper divisors (228309567041).

513696525813 is a wasteful number, since it uses less digits than its factorization.

513696525813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57077391763 (or 57077391760 counting only the distinct ones).

The product of its digits is 5832000, while the sum is 54.

The spelling of 513696525813 in words is "five hundred thirteen billion, six hundred ninety-six million, five hundred twenty-five thousand, eight hundred thirteen".