409994371386 has 80 divisors (see below), whose sum is σ = 926859225600. Its totient is φ = 135455097312.

The previous prime is 409994371363. The next prime is 409994371387. The reversal of 409994371386 is 683173499904.

409994371386 is a `hidden beast` number, since 409 + 9 + 94 + 3 + 7 + 138 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (409994371387) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8248075 + ... + 8297633.

It is an arithmetic number, because the mean of its divisors is an integer number (11585740320).

Almost surely, 2^409994371386 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 409994371386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (463429612800).

409994371386 is an abundant number, since it is smaller than the sum of its proper divisors (516864854214).

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

409994371386 is a wasteful number, since it uses less digits than its factorization.

409994371386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50025 (or 50016 counting only the distinct ones).

The product of its (nonzero) digits is 35271936, while the sum is 63.

The spelling of 409994371386 in words is "four hundred nine billion, nine hundred ninety-four million, three hundred seventy-one thousand, three hundred eighty-six".