513449969615 has 16 divisors (see below), whose sum is σ = 673649719200. Its totient is φ = 372586475520.

The previous prime is 513449969587. The next prime is 513449969639. The reversal of 513449969615 is 516969944315.

It is not a de Polignac number, because 513449969615 - 2¹⁸ = 513449707471 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10371134 + ... + 10420523.

It is an arithmetic number, because the mean of its divisors is an integer number (42103107450).

Almost surely, 2^513449969615 is an apocalyptic number.

513449969615 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

513449969615 is a deficient number, since it is larger than the sum of its proper divisors (160199749585).

513449969615 is a wasteful number, since it uses less digits than its factorization.

513449969615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20792122.

The product of its digits is 31492800, while the sum is 62.

The spelling of 513449969615 in words is "five hundred thirteen billion, four hundred forty-nine million, nine hundred sixty-nine thousand, six hundred fifteen".