1285799512693 has 4 divisors (see below), whose sum is σ = 1286838963820. Its totient is φ = 1284760061568.

The previous prime is 1285799512649. The next prime is 1285799512703. The reversal of 1285799512693 is 3962159975821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 902382203844 + 383417308849 = 949938^2 + 619207^2 .

It is a cyclic number.

It is not a de Polignac number, because 1285799512693 - 2³⁷ = 1148360559221 is a prime.

It is a super-2 number, since 2×1285799512693² (a number of 25 digits) contains 22 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 (1285799513693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 519723708 + ... + 519726181.

It is an arithmetic number, because the mean of its divisors is an integer number (321709740955).

Almost surely, 2^{1285799512693} is an apocalyptic number.

It is an amenable number.

1285799512693 is a deficient number, since it is larger than the sum of its proper divisors (1039451127).

1285799512693 is a wasteful number, since it uses less digits than its factorization.

1285799512693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039451126.

The product of its digits is 73483200, while the sum is 67.

The spelling of 1285799512693 in words is "one trillion, two hundred eighty-five billion, seven hundred ninety-nine million, five hundred twelve thousand, six hundred ninety-three".