509696864651 has 12 divisors (see below), whose sum is σ = 564755636808. Its totient is φ = 459547792704.

The previous prime is 509696864639. The next prime is 509696864657. The reversal of 509696864651 is 156468696905.

It is not a de Polignac number, because 509696864651 - 2⁶ = 509696864587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (509696864657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35062010 + ... + 35076543.

It is an arithmetic number, because the mean of its divisors is an integer number (47062969734).

Almost surely, 2^509696864651 is an apocalyptic number.

509696864651 is a deficient number, since it is larger than the sum of its proper divisors (55058772157).

509696864651 is a wasteful number, since it uses less digits than its factorization.

509696864651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70138622 (or 70138609 counting only the distinct ones).

The product of its (nonzero) digits is 83980800, while the sum is 65.

The spelling of 509696864651 in words is "five hundred nine billion, six hundred ninety-six million, eight hundred sixty-four thousand, six hundred fifty-one".