28691191674697 has 16 divisors (see below), whose sum is σ = 29711492995072. Its totient is φ = 27676885800960.

The previous prime is 28691191674659. The next prime is 28691191674727. The reversal of 28691191674697 is 79647619119682.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28691191674697 - 2⁴³ = 19895098652489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28691191674637) 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 15 ways as a sum of consecutive naturals, for example, 23442853 + ... + 24636349.

It is an arithmetic number, because the mean of its divisors is an integer number (1856968312192).

Almost surely, 2^{28691191674697} is an apocalyptic number.

It is an amenable number.

28691191674697 is a deficient number, since it is larger than the sum of its proper divisors (1020301320375).

28691191674697 is a wasteful number, since it uses less digits than its factorization.

28691191674697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196008.

The product of its digits is 493807104, while the sum is 76.

The spelling of 28691191674697 in words is "twenty-eight trillion, six hundred ninety-one billion, one hundred ninety-one million, six hundred seventy-four thousand, six hundred ninety-seven".