28117557617693 has 16 divisors (see below), whose sum is σ = 28356368284800. Its totient is φ = 27879983376960.

The previous prime is 28117557617671. The next prime is 28117557617701. The reversal of 28117557617693 is 39671675571182.

It is a cyclic number.

It is not a de Polignac number, because 28117557617693 - 2⁶ = 28117557617629 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 (28117557617593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62275328 + ... + 62725206.

It is an arithmetic number, because the mean of its divisors is an integer number (1772273017800).

Almost surely, 2^{28117557617693} is an apocalyptic number.

It is an amenable number.

28117557617693 is a deficient number, since it is larger than the sum of its proper divisors (238810667107).

28117557617693 is a wasteful number, since it uses less digits than its factorization.

28117557617693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451252.

The product of its digits is 133358400, while the sum is 68.

The spelling of 28117557617693 in words is "twenty-eight trillion, one hundred seventeen billion, five hundred fifty-seven million, six hundred seventeen thousand, six hundred ninety-three".