1993644965629 has 8 divisors (see below), whose sum is σ = 2019965502240. Its totient is φ = 1967379208176.

The previous prime is 1993644965623. The next prime is 1993644965659. The reversal of 1993644965629 is 9265694463991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1993644965629 - 2³ = 1993644965621 is a prime.

It is a super-3 number, since 3×1993644965629³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1993644965621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13621519 + ... + 13767100.

It is an arithmetic number, because the mean of its divisors is an integer number (252495687780).

Almost surely, 2^{1993644965629} is an apocalyptic number.

It is an amenable number.

1993644965629 is a deficient number, since it is larger than the sum of its proper divisors (26320536611).

1993644965629 is an equidigital number, since it uses as much as digits as its factorization.

1993644965629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27389579.

The product of its digits is 680244480, while the sum is 73.

The spelling of 1993644965629 in words is "one trillion, nine hundred ninety-three billion, six hundred forty-four million, nine hundred sixty-five thousand, six hundred twenty-nine".