400304333505 has 16 divisors (see below), whose sum is σ = 641267083584. Its totient is φ = 213235594560.

The previous prime is 400304333423. The next prime is 400304333551. The reversal of 400304333505 is 505333403004.

It is not a de Polignac number, because 400304333505 - 2¹² = 400304329409 is a prime.

It is a Curzon 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 15 ways as a sum of consecutive naturals, for example, 16240399 + ... + 16265028.

It is an arithmetic number, because the mean of its divisors is an integer number (40079192724).

Almost surely, 2^400304333505 is an apocalyptic number.

It is an amenable number.

400304333505 is a deficient number, since it is larger than the sum of its proper divisors (240962750079).

400304333505 is a wasteful number, since it uses less digits than its factorization.

400304333505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32506256.

The product of its (nonzero) digits is 32400, while the sum is 30.

Adding to 400304333505 its reverse (505333403004), we get a palindrome (905637736509).

The spelling of 400304333505 in words is "four hundred billion, three hundred four million, three hundred thirty-three thousand, five hundred five".