509717975964 has 24 divisors (see below), whose sum is σ = 1189944808080. Its totient is φ = 169819868544.

The previous prime is 509717975917. The next prime is 509717975969. The reversal of 509717975964 is 469579717905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509717975969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10740769 + ... + 10788120.

It is an arithmetic number, because the mean of its divisors is an integer number (49581033670).

Almost surely, 2^509717975964 is an apocalyptic number.

It is an amenable number.

509717975964 is an abundant number, since it is smaller than the sum of its proper divisors (680226832116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

509717975964 is a wasteful number, since it uses less digits than its factorization.

509717975964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21530869 (or 21530867 counting only the distinct ones).

The product of its (nonzero) digits is 150028200, while the sum is 69.

The spelling of 509717975964 in words is "five hundred nine billion, seven hundred seventeen million, nine hundred seventy-five thousand, nine hundred sixty-four".