513664354166266 has 4 divisors (see below), whose sum is σ = 770496531249402. Its totient is φ = 256832177083132.

The previous prime is 513664354166203. The next prime is 513664354166279. The reversal of 513664354166266 is 662661453466315.

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

It can be written as a sum of positive squares in only one way, i.e., 439412613033241 + 74251741133025 = 20962171^2 + 8616945^2 .

It is a junction number, because it is equal to n+sod(n) for n = 513664354166198 and 513664354166207.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128416088541565 + ... + 128416088541568.

Almost surely, 2^{513664354166266} is an apocalyptic number.

513664354166266 is a deficient number, since it is larger than the sum of its proper divisors (256832177083136).

513664354166266 is a wasteful number, since it uses less digits than its factorization.

513664354166266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256832177083135.

The product of its digits is 335923200, while the sum is 64.

The spelling of 513664354166266 in words is "five hundred thirteen trillion, six hundred sixty-four billion, three hundred fifty-four million, one hundred sixty-six thousand, two hundred sixty-six".