409071819854 has 16 divisors (see below), whose sum is σ = 640364095008. Its totient is φ = 195619281792.

The previous prime is 409071819853. The next prime is 409071819857. The reversal of 409071819854 is 458918170904.

It is a self number, because there is not a number n which added to its sum of digits gives 409071819854.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409071819853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154247 + ... + 917570.

It is an arithmetic number, because the mean of its divisors is an integer number (40022755938).

Almost surely, 2^409071819854 is an apocalyptic number.

409071819854 is a deficient number, since it is larger than the sum of its proper divisors (231292275154).

409071819854 is a wasteful number, since it uses less digits than its factorization.

409071819854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080139.

The product of its (nonzero) digits is 2903040, while the sum is 56.

The spelling of 409071819854 in words is "four hundred nine billion, seventy-one million, eight hundred nineteen thousand, eight hundred fifty-four".