509365791051 has 16 divisors (see below), whose sum is σ = 731908937760. Its totient is φ = 313236483840.

The previous prime is 509365790981. The next prime is 509365791061. The reversal of 509365791051 is 150197563905.

It is not a de Polignac number, because 509365791051 - 2³⁸ = 234487884107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 509365790985 and 509365791003.

It is not an unprimeable number, because it can be changed into a prime (509365791061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4514130 + ... + 4625591.

It is an arithmetic number, because the mean of its divisors is an integer number (45744308610).

Almost surely, 2^509365791051 is an apocalyptic number.

509365791051 is a deficient number, since it is larger than the sum of its proper divisors (222543146709).

509365791051 is a wasteful number, since it uses less digits than its factorization.

509365791051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9141166.

The product of its (nonzero) digits is 1275750, while the sum is 51.

The spelling of 509365791051 in words is "five hundred nine billion, three hundred sixty-five million, seven hundred ninety-one thousand, fifty-one".