400204140505 has 32 divisors (see below), whose sum is σ = 530438299776. Its totient is φ = 287994921984.

The previous prime is 400204140499. The next prime is 400204140569. The reversal of 400204140505 is 505041402004.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 400204140505 - 2³¹ = 398056656857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400204140505.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1044894 + ... + 1375576.

It is an arithmetic number, because the mean of its divisors is an integer number (16576196868).

Almost surely, 2^400204140505 is an apocalyptic number.

It is an amenable number.

400204140505 is a deficient number, since it is larger than the sum of its proper divisors (130234159271).

400204140505 is a wasteful number, since it uses less digits than its factorization.

400204140505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331177.

The product of its (nonzero) digits is 3200, while the sum is 25.

Adding to 400204140505 its reverse (505041402004), we get a palindrome (905245542509).

The spelling of 400204140505 in words is "four hundred billion, two hundred four million, one hundred forty thousand, five hundred five".