505509975516 has 96 divisors (see below), whose sum is σ = 1463152230400. Its totient is φ = 132271501824.

The previous prime is 505509975511. The next prime is 505509975541. The reversal of 505509975516 is 615579905505.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505509975511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1683841 + ... + 1961208.

Almost surely, 2^505509975516 is an apocalyptic number.

It is an amenable number.

505509975516 is an abundant number, since it is smaller than the sum of its proper divisors (957642254884).

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

505509975516 is a wasteful number, since it uses less digits than its factorization.

505509975516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3645203 (or 3645201 counting only the distinct ones).

The product of its (nonzero) digits is 10631250, while the sum is 57.

The spelling of 505509975516 in words is "five hundred five billion, five hundred nine million, nine hundred seventy-five thousand, five hundred sixteen".