409991800042 has 8 divisors (see below), whose sum is σ = 670895672832. Its totient is φ = 186359909100.

The previous prime is 409991800037. The next prime is 409991800069. The reversal of 409991800042 is 240008199904.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×409991800042² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 409991799965 and 409991800001.

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 3 ways as a sum of consecutive naturals, for example, 9317995434 + ... + 9317995477.

It is an arithmetic number, because the mean of its divisors is an integer number (83861959104).

Almost surely, 2^409991800042 is an apocalyptic number.

409991800042 is a deficient number, since it is larger than the sum of its proper divisors (260903872790).

409991800042 is a wasteful number, since it uses less digits than its factorization.

409991800042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18635990924.

The product of its (nonzero) digits is 186624, while the sum is 46.

Adding to 409991800042 its reverse (240008199904), we get a palindrome (649999999946).

The spelling of 409991800042 in words is "four hundred nine billion, nine hundred ninety-one million, eight hundred thousand, forty-two".