28185120542041 has 4 divisors (see below), whose sum is σ = 29410560565632. Its totient is φ = 26959680518452.

The previous prime is 28185120542039. The next prime is 28185120542057. The reversal of 28185120542041 is 14024502158182.

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 28185120542041 - 2¹ = 28185120542039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28185120542021) 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, 612720011761 + ... + 612720011806.

It is an arithmetic number, because the mean of its divisors is an integer number (7352640141408).

Almost surely, 2^{28185120542041} is an apocalyptic number.

It is an amenable number.

28185120542041 is a deficient number, since it is larger than the sum of its proper divisors (1225440023591).

28185120542041 is a wasteful number, since it uses less digits than its factorization.

28185120542041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225440023590.

The product of its (nonzero) digits is 204800, while the sum is 43.

The spelling of 28185120542041 in words is "twenty-eight trillion, one hundred eighty-five billion, one hundred twenty million, five hundred forty-two thousand, forty-one".