5209512364145 has 4 divisors (see below), whose sum is σ = 6251414836980. Its totient is φ = 4167609891312.

The previous prime is 5209512364117. The next prime is 5209512364169. The reversal of 5209512364145 is 5414632159025.

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 2714177170576 + 2495335193569 = 1647476^2 + 1579663^2 .

It is a cyclic number.

It is not a de Polignac number, because 5209512364145 - 2¹⁶ = 5209512298609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5209512364145.

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, 520951236410 + ... + 520951236419.

It is an arithmetic number, because the mean of its divisors is an integer number (1562853709245).

Almost surely, 2^{5209512364145} is an apocalyptic number.

It is an amenable number.

5209512364145 is a deficient number, since it is larger than the sum of its proper divisors (1041902472835).

5209512364145 is a wasteful number, since it uses less digits than its factorization.

5209512364145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041902472834.

The product of its (nonzero) digits is 1296000, while the sum is 47.

The spelling of 5209512364145 in words is "five trillion, two hundred nine billion, five hundred twelve million, three hundred sixty-four thousand, one hundred forty-five".