509683491900 has 108 divisors (see below), whose sum is σ = 1742808677064. Its totient is φ = 123559632000.

The previous prime is 509683491893. The next prime is 509683491923. The reversal of 509683491900 is 9194386905.

509683491900 is a `hidden beast` number, since 5 + 0 + 9 + 68 + 3 + 491 + 90 + 0 = 666.

It is a super-2 number, since 2×509683491900² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 25731691 + ... + 25751490.

Almost surely, 2^509683491900 is an apocalyptic number.

509683491900 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

509683491900 is an abundant number, since it is smaller than the sum of its proper divisors (1233125185164).

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

509683491900 is a wasteful number, since it uses less digits than its factorization.

509683491900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51483212 (or 51483202 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 54.

The spelling of 509683491900 in words is "five hundred nine billion, six hundred eighty-three million, four hundred ninety-one thousand, nine hundred".