509881082994 has 24 divisors (see below), whose sum is σ = 1169727191100. Its totient is φ = 159962692608.

The previous prime is 509881082957. The next prime is 509881082999. The reversal of 509881082994 is 499280188905.

509881082994 is a `hidden beast` number, since 509 + 8 + 8 + 10 + 8 + 29 + 94 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 509860262025 + 20820969 = 714045^2 + 4563^2 .

It is not an unprimeable number, because it can be changed into a prime (509881082999) 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 11 ways as a sum of consecutive naturals, for example, 833138719 + ... + 833139330.

Almost surely, 2^509881082994 is an apocalyptic number.

509881082994 is an abundant number, since it is smaller than the sum of its proper divisors (659846108106).

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

509881082994 is a wasteful number, since it uses less digits than its factorization.

509881082994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666278074 (or 1666278071 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 63.

The spelling of 509881082994 in words is "five hundred nine billion, eight hundred eighty-one million, eighty-two thousand, nine hundred ninety-four".