28503505582801 has 4 divisors (see below), whose sum is σ = 28769893485552. Its totient is φ = 28237117680052.

The previous prime is 28503505582789. The next prime is 28503505582819. The reversal of 28503505582801 is 10828550530582.

It is a happy number.

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 28503505582801 - 2¹⁵ = 28503505550033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28503505582891) 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, 133193951215 + ... + 133193951428.

It is an arithmetic number, because the mean of its divisors is an integer number (7192473371388).

Almost surely, 2^{28503505582801} is an apocalyptic number.

It is an amenable number.

28503505582801 is a deficient number, since it is larger than the sum of its proper divisors (266387902751).

28503505582801 is a wasteful number, since it uses less digits than its factorization.

28503505582801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266387902750.

The product of its (nonzero) digits is 3840000, while the sum is 52.

The spelling of 28503505582801 in words is "twenty-eight trillion, five hundred three billion, five hundred five million, five hundred eighty-two thousand, eight hundred one".