28243566377817 has 32 divisors (see below), whose sum is σ = 43921841376000. Its totient is φ = 16137084870144.

The previous prime is 28243566377813. The next prime is 28243566377839. The reversal of 28243566377817 is 71877366534282.

It is not a de Polignac number, because 28243566377817 - 2² = 28243566377813 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28243566377813) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6162409 + ... + 9719177.

It is an arithmetic number, because the mean of its divisors is an integer number (1372557543000).

Almost surely, 2^{28243566377817} is an apocalyptic number.

It is an amenable number.

28243566377817 is a deficient number, since it is larger than the sum of its proper divisors (15678274998183).

28243566377817 is an equidigital number, since it uses as much as digits as its factorization.

28243566377817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3564510 (or 3564496 counting only the distinct ones).

The product of its digits is 568995840, while the sum is 69.

The spelling of 28243566377817 in words is "twenty-eight trillion, two hundred forty-three billion, five hundred sixty-six million, three hundred seventy-seven thousand, eight hundred seventeen".