400523540344 has 8 divisors (see below), whose sum is σ = 750981638160. Its totient is φ = 200261770168.

The previous prime is 400523540303. The next prime is 400523540401. The reversal of 400523540344 is 443045325004.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 25032721264 + ... + 25032721279.

It is an arithmetic number, because the mean of its divisors is an integer number (93872704770).

Almost surely, 2^400523540344 is an apocalyptic number.

It is an amenable number.

400523540344 is a deficient number, since it is larger than the sum of its proper divisors (350458097816).

400523540344 is a wasteful number, since it uses less digits than its factorization.

400523540344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50065442549 (or 50065442545 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 34.

Adding to 400523540344 its reverse (443045325004), we get a palindrome (843568865348).

The spelling of 400523540344 in words is "four hundred billion, five hundred twenty-three million, five hundred forty thousand, three hundred forty-four".