400365204145 has 4 divisors (see below), whose sum is σ = 480438244980. Its totient is φ = 320292163312.

The previous prime is 400365204133. The next prime is 400365204179. The reversal of 400365204145 is 541402563004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 284130575521 + 116234628624 = 533039^2 + 340932^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400365204145 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400365204145.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40036520410 + ... + 40036520419.

It is an arithmetic number, because the mean of its divisors is an integer number (120109561245).

Almost surely, 2^400365204145 is an apocalyptic number.

It is an amenable number.

400365204145 is a deficient number, since it is larger than the sum of its proper divisors (80073040835).

400365204145 is an equidigital number, since it uses as much as digits as its factorization.

400365204145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80073040834.

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 400365204145 its reverse (541402563004), we get a palindrome (941767767149).

The spelling of 400365204145 in words is "four hundred billion, three hundred sixty-five million, two hundred four thousand, one hundred forty-five".