509916495605 has 32 divisors (see below), whose sum is σ = 703154511360. Its totient is φ = 351082797120.

The previous prime is 509916495581. The next prime is 509916495611. The reversal of 509916495605 is 506594619905.

It is not a de Polignac number, because 509916495605 - 2²⁸ = 509648060149 is a prime.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1320242 + ... + 1662188.

It is an arithmetic number, because the mean of its divisors is an integer number (21973578480).

Almost surely, 2^509916495605 is an apocalyptic number.

509916495605 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

509916495605 is a deficient number, since it is larger than the sum of its proper divisors (193238015755).

509916495605 is a wasteful number, since it uses less digits than its factorization.

509916495605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343409.

The product of its (nonzero) digits is 13122000, while the sum is 59.

The spelling of 509916495605 in words is "five hundred nine billion, nine hundred sixteen million, four hundred ninety-five thousand, six hundred five".