509545909546 has 4 divisors (see below), whose sum is σ = 764318864322. Its totient is φ = 254772954772.

The previous prime is 509545909507. The next prime is 509545909589. The reversal of 509545909546 is 645909545905.

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., 343558927321 + 165986982225 = 586139^2 + 407415^2 .

It is a super-2 number, since 2×509545909546² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127386477385 + ... + 127386477388.

Almost surely, 2^509545909546 is an apocalyptic number.

509545909546 is a deficient number, since it is larger than the sum of its proper divisors (254772954776).

509545909546 is a wasteful number, since it uses less digits than its factorization.

509545909546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254772954775.

The product of its (nonzero) digits is 43740000, while the sum is 61.

The spelling of 509545909546 in words is "five hundred nine billion, five hundred forty-five million, nine hundred nine thousand, five hundred forty-six".