509299890847 has 48 divisors (see below), whose sum is σ = 613081907200. Its totient is φ = 421132219200.

The previous prime is 509299890797. The next prime is 509299890871. The reversal of 509299890847 is 748098992905.

It is a de Polignac number, because none of the positive numbers 2^k-509299890847 is a prime.

It is a super-2 number, since 2×509299890847² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509299890947) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9023029 + ... + 9079297.

Almost surely, 2^509299890847 is an apocalyptic number.

509299890847 is a deficient number, since it is larger than the sum of its proper divisors (103782016353).

509299890847 is a wasteful number, since it uses less digits than its factorization.

509299890847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56468 (or 56457 counting only the distinct ones).

The product of its (nonzero) digits is 117573120, while the sum is 70.

The spelling of 509299890847 in words is "five hundred nine billion, two hundred ninety-nine million, eight hundred ninety thousand, eight hundred forty-seven".