1313503643644 has 12 divisors (see below), whose sum is σ = 2299082035768. Its totient is φ = 656623062000.

The previous prime is 1313503643597. The next prime is 1313503643651. The reversal of 1313503643644 is 4463463053131.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1313503643644.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32167002 + ... + 32207809.

Almost surely, 2^{1313503643644} is an apocalyptic number.

It is an amenable number.

1313503643644 is a deficient number, since it is larger than the sum of its proper divisors (985578392124).

1313503643644 is a wasteful number, since it uses less digits than its factorization.

1313503643644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64379916 (or 64379914 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 43.

Adding to 1313503643644 its reverse (4463463053131), we get a palindrome (5776966696775).

The spelling of 1313503643644 in words is "one trillion, three hundred thirteen billion, five hundred three million, six hundred forty-three thousand, six hundred forty-four".