2400404006243 has 4 divisors (see below), whose sum is σ = 2401768649280. Its totient is φ = 2399039363208.

The previous prime is 2400404006219. The next prime is 2400404006251. The reversal of 2400404006243 is 3426004040042.

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

It is a cyclic number.

It is not a de Polignac number, because 2400404006243 - 2¹² = 2400404002147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2400404006263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 682318880 + ... + 682322397.

It is an arithmetic number, because the mean of its divisors is an integer number (600442162320).

Almost surely, 2^{2400404006243} is an apocalyptic number.

2400404006243 is a deficient number, since it is larger than the sum of its proper divisors (1364643037).

2400404006243 is a wasteful number, since it uses less digits than its factorization.

2400404006243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1364643036.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 2400404006243 its reverse (3426004040042), we get a palindrome (5826408046285).

The spelling of 2400404006243 in words is "two trillion, four hundred billion, four hundred four million, six thousand, two hundred forty-three".