1993457339643 has 64 divisors (see below), whose sum is σ = 3404245791744. Its totient is φ = 1007440896000.

The previous prime is 1993457339639. The next prime is 1993457339677. The reversal of 1993457339643 is 3469337543991.

It is not a de Polignac number, because 1993457339643 - 2² = 1993457339639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1993457339623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3045133 + ... + 3641393.

It is an arithmetic number, because the mean of its divisors is an integer number (53191340496).

Almost surely, 2^{1993457339643} is an apocalyptic number.

1993457339643 is a deficient number, since it is larger than the sum of its proper divisors (1410788452101).

1993457339643 is a wasteful number, since it uses less digits than its factorization.

1993457339643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596676.

The product of its digits is 198404640, while the sum is 66.

The spelling of 1993457339643 in words is "one trillion, nine hundred ninety-three billion, four hundred fifty-seven million, three hundred thirty-nine thousand, six hundred forty-three".