523643621431144 has 16 divisors (see below), whose sum is σ = 985376309285700. Its totient is φ = 260876605621632.

The previous prime is 523643621431037. The next prime is 523643621431159. The reversal of 523643621431144 is 441134126346325.

It can be written as a sum of positive squares in 2 ways, for example, as 448001672602500 + 75641948828644 = 21166050^2 + 8697238^2 .

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, 118150634389 + ... + 118150638820.

Almost surely, 2^{523643621431144} is an apocalyptic number.

It is an amenable number.

523643621431144 is a deficient number, since it is larger than the sum of its proper divisors (461732687854556).

523643621431144 is a wasteful number, since it uses less digits than its factorization.

523643621431144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236301273492 (or 236301273488 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 49.

Adding to 523643621431144 its reverse (441134126346325), we get a palindrome (964777747777469).

The spelling of 523643621431144 in words is "five hundred twenty-three trillion, six hundred forty-three billion, six hundred twenty-one million, four hundred thirty-one thousand, one hundred forty-four".