400144311011 has 4 divisors (see below), whose sum is σ = 400498735800. Its totient is φ = 399789886224.

The previous prime is 400144311001. The next prime is 400144311029. The reversal of 400144311011 is 110113441004.

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 400144311011 - 2¹⁸ = 400144048867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400144311001) 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, 177210701 + ... + 177212958.

It is an arithmetic number, because the mean of its divisors is an integer number (100124683950).

Almost surely, 2^400144311011 is an apocalyptic number.

400144311011 is a deficient number, since it is larger than the sum of its proper divisors (354424789).

400144311011 is a wasteful number, since it uses less digits than its factorization.

400144311011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354424788.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 400144311011 its reverse (110113441004), we get a palindrome (510257752015).

The spelling of 400144311011 in words is "four hundred billion, one hundred forty-four million, three hundred eleven thousand, eleven".