409827989646 has 12 divisors (see below), whose sum is σ = 887960644272. Its totient is φ = 136609329876.

The previous prime is 409827989633. The next prime is 409827989693. The reversal of 409827989646 is 646989728904.

409827989646 is a `hidden beast` number, since 409 + 8 + 2 + 7 + 98 + 96 + 46 = 666.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 11384110806 + ... + 11384110841.

It is an arithmetic number, because the mean of its divisors is an integer number (73996720356).

Almost surely, 2^409827989646 is an apocalyptic number.

409827989646 is an abundant number, since it is smaller than the sum of its proper divisors (478132654626).

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

409827989646 is a wasteful number, since it uses less digits than its factorization.

409827989646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22768221655 (or 22768221652 counting only the distinct ones).

The product of its (nonzero) digits is 376233984, while the sum is 72.

The spelling of 409827989646 in words is "four hundred nine billion, eight hundred twenty-seven million, nine hundred eighty-nine thousand, six hundred forty-six".