1994012645693 has 8 divisors (see below), whose sum is σ = 2050021289400. Its totient is φ = 1938355153920.

The previous prime is 1994012645641. The next prime is 1994012645711. The reversal of 1994012645693 is 3965462104991.

It can be written as a sum of positive squares in 4 ways, for example, as 57581761444 + 1936430884249 = 239962^2 + 1391557^2 .

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 1994012645693 - 2¹⁰ = 1994012644669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1994012645623) 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 7 ways as a sum of consecutive naturals, for example, 87776468 + ... + 87799181.

It is an arithmetic number, because the mean of its divisors is an integer number (256252661175).

Almost surely, 2^{1994012645693} is an apocalyptic number.

It is an amenable number.

1994012645693 is a deficient number, since it is larger than the sum of its proper divisors (56008643707).

1994012645693 is a wasteful number, since it uses less digits than its factorization.

1994012645693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175575967.

The product of its (nonzero) digits is 12597120, while the sum is 59.

The spelling of 1994012645693 in words is "one trillion, nine hundred ninety-four billion, twelve million, six hundred forty-five thousand, six hundred ninety-three".