400001345421344 has 24 divisors (see below), whose sum is σ = 788334225044688. Its totient is φ = 199789478743360.

The previous prime is 400001345421331. The next prime is 400001345421383. The reversal of 400001345421344 is 443124543100004.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6599780702 + ... + 6599841309.

It is an arithmetic number, because the mean of its divisors is an integer number (32847259376862).

Almost surely, 2^{400001345421344} is an apocalyptic number.

It is an amenable number.

400001345421344 is a deficient number, since it is larger than the sum of its proper divisors (388332879623344).

400001345421344 is a wasteful number, since it uses less digits than its factorization.

400001345421344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13199622968 (or 13199622960 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 35.

Adding to 400001345421344 its reverse (443124543100004), we get a palindrome (843125888521348).

The spelling of 400001345421344 in words is "four hundred trillion, one billion, three hundred forty-five million, four hundred twenty-one thousand, three hundred forty-four".