400264344065 has 8 divisors (see below), whose sum is σ = 493298759400. Its totient is φ = 311557110912.

The previous prime is 400264344061. The next prime is 400264344101. The reversal of 400264344065 is 560443462004.

It can be written as a sum of positive squares in 4 ways, for example, as 89918418496 + 310345925569 = 299864^2 + 557087^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 400264344065 - 2² = 400264344061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400264344061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1081795340 + ... + 1081795709.

It is an arithmetic number, because the mean of its divisors is an integer number (61662344925).

Almost surely, 2^400264344065 is an apocalyptic number.

It is an amenable number.

400264344065 is a deficient number, since it is larger than the sum of its proper divisors (93034415335).

400264344065 is a wasteful number, since it uses less digits than its factorization.

400264344065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2163591091.

The product of its (nonzero) digits is 276480, while the sum is 38.

The spelling of 400264344065 in words is "four hundred billion, two hundred sixty-four million, three hundred forty-four thousand, sixty-five".