400253035544 has 16 divisors (see below), whose sum is σ = 755254536000. Its totient is φ = 198851825952.

The previous prime is 400253035537. The next prime is 400253035561. The reversal of 400253035544 is 445530352004.

It is a congruent 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, 159335144 + ... + 159337655.

It is an arithmetic number, because the mean of its divisors is an integer number (47203408500).

Almost surely, 2^400253035544 is an apocalyptic number.

It is an amenable number.

400253035544 is a deficient number, since it is larger than the sum of its proper divisors (355001500456).

400253035544 is a wasteful number, since it uses less digits than its factorization.

400253035544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318672962 (or 318672958 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 35.

Adding to 400253035544 its reverse (445530352004), we get a palindrome (845783387548).

The spelling of 400253035544 in words is "four hundred billion, two hundred fifty-three million, thirty-five thousand, five hundred forty-four".