509505790168 has 8 divisors (see below), whose sum is σ = 955323356580. Its totient is φ = 254752895080.

The previous prime is 509505790147. The next prime is 509505790207. The reversal of 509505790168 is 861097505905.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31844111878 + ... + 31844111893.

Almost surely, 2^509505790168 is an apocalyptic number.

It is an amenable number.

509505790168 is a deficient number, since it is larger than the sum of its proper divisors (445817566412).

509505790168 is a wasteful number, since it uses less digits than its factorization.

509505790168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63688223777 (or 63688223773 counting only the distinct ones).

The product of its (nonzero) digits is 3402000, while the sum is 55.

The spelling of 509505790168 in words is "five hundred nine billion, five hundred five million, seven hundred ninety thousand, one hundred sixty-eight".