509695999999 has 8 divisors (see below), whose sum is σ = 541436032368. Its totient is φ = 478151291520.

The previous prime is 509695999951. The next prime is 509696000003. The reversal of 509695999999 is 999999596905.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 509695999999 - 2⁹ = 509695999487 is a prime.

It is a Duffinian number.

509695999999 is a modest number, since divided by 999999 gives 509695 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509695994999) 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, 48825592 + ... + 48836029.

It is an arithmetic number, because the mean of its divisors is an integer number (67679504046).

Almost surely, 2^509695999999 is an apocalyptic number.

509695999999 is a deficient number, since it is larger than the sum of its proper divisors (31740032369).

509695999999 is a wasteful number, since it uses less digits than its factorization.

509695999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97661945.

The product of its (nonzero) digits is 6457008150, while the sum is 88.

The spelling of 509695999999 in words is "five hundred nine billion, six hundred ninety-five million, nine hundred ninety-nine thousand, nine hundred ninety-nine".