28083753368561 has 4 divisors (see below), whose sum is σ = 30636821856624. Its totient is φ = 25530684880500.

The previous prime is 28083753368543. The next prime is 28083753368569. The reversal of 28083753368561 is 16586335738082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28083753368561 - 2⁶ = 28083753368497 is a prime.

It is a super-2 number, since 2×28083753368561² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28083753368569) 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, 1276534244015 + ... + 1276534244036.

It is an arithmetic number, because the mean of its divisors is an integer number (7659205464156).

Almost surely, 2^{28083753368561} is an apocalyptic number.

It is an amenable number.

28083753368561 is a deficient number, since it is larger than the sum of its proper divisors (2553068488063).

28083753368561 is a wasteful number, since it uses less digits than its factorization.

28083753368561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2553068488062.

The product of its (nonzero) digits is 174182400, while the sum is 65.

The spelling of 28083753368561 in words is "twenty-eight trillion, eighty-three billion, seven hundred fifty-three million, three hundred sixty-eight thousand, five hundred sixty-one".