1403221406644 has 6 divisors (see below), whose sum is σ = 2455637461634. Its totient is φ = 701610703320.

The previous prime is 1403221406633. The next prime is 1403221406647. The reversal of 1403221406644 is 4466041223041.

It can be written as a sum of positive squares in only one way, i.e., 1387636880400 + 15584526244 = 1177980^2 + 124838^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1403221406647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175402675827 + ... + 175402675834.

Almost surely, 2^{1403221406644} is an apocalyptic number.

It is an amenable number.

1403221406644 is a deficient number, since it is larger than the sum of its proper divisors (1052416054990).

1403221406644 is a wasteful number, since it uses less digits than its factorization.

1403221406644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350805351665 (or 350805351663 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 37.

Adding to 1403221406644 its reverse (4466041223041), we get a palindrome (5869262629685).

The spelling of 1403221406644 in words is "one trillion, four hundred three billion, two hundred twenty-one million, four hundred six thousand, six hundred forty-four".