28006542492365 has 4 divisors (see below), whose sum is σ = 33607850990844. Its totient is φ = 22405233993888.

The previous prime is 28006542492277. The next prime is 28006542492371. The reversal of 28006542492365 is 56329424560082.

It is a happy number.

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 7910302500676 + 20096239991689 = 2812526^2 + 4482883^2 .

It is a cyclic number.

It is not a de Polignac number, because 28006542492365 - 2⁴⁰ = 26907030864589 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28006542492365.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2800654249232 + ... + 2800654249241.

It is an arithmetic number, because the mean of its divisors is an integer number (8401962747711).

Almost surely, 2^{28006542492365} is an apocalyptic number.

It is an amenable number.

28006542492365 is a deficient number, since it is larger than the sum of its proper divisors (5601308498479).

28006542492365 is an equidigital number, since it uses as much as digits as its factorization.

28006542492365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5601308498478.

The product of its (nonzero) digits is 24883200, while the sum is 56.

The spelling of 28006542492365 in words is "twenty-eight trillion, six billion, five hundred forty-two million, four hundred ninety-two thousand, three hundred sixty-five".