409090909090908 has 96 divisors (see below), whose sum is σ = 1043361677659392. Its totient is φ = 123724182758400.

The previous prime is 409090909090901. The next prime is 409090909090909. The reversal of 409090909090908 is 809090909090904.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409090909090901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1631402418 + ... + 1631653158.

It is an arithmetic number, because the mean of its divisors is an integer number (10868350808952).

Almost surely, 2^{409090909090908} is an apocalyptic number.

It is an amenable number.

409090909090908 is an abundant number, since it is smaller than the sum of its proper divisors (634270768568484).

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

409090909090908 is a wasteful number, since it uses less digits than its factorization.

409090909090908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274915 (or 274913 counting only the distinct ones).

The product of its (nonzero) digits is 17006112, while the sum is 66.

The spelling of 409090909090908 in words is "four hundred nine trillion, ninety billion, nine hundred nine million, ninety thousand, nine hundred eight".