513215563655 has 4 divisors (see below), whose sum is σ = 615858676392. Its totient is φ = 410572450920.

The previous prime is 513215563639. The next prime is 513215563699. The reversal of 513215563655 is 556365512315.

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

It is not a de Polignac number, because 513215563655 - 2⁴ = 513215563639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51321556361 + ... + 51321556370.

It is an arithmetic number, because the mean of its divisors is an integer number (153964669098).

Almost surely, 2^513215563655 is an apocalyptic number.

513215563655 is a deficient number, since it is larger than the sum of its proper divisors (102643112737).

513215563655 is a wasteful number, since it uses less digits than its factorization.

513215563655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102643112736.

The product of its digits is 2025000, while the sum is 47.

The spelling of 513215563655 in words is "five hundred thirteen billion, two hundred fifteen million, five hundred sixty-three thousand, six hundred fifty-five".