28195653841 has 4 divisors (see below), whose sum is σ = 29854221732. Its totient is φ = 26537085952.

The previous prime is 28195653823. The next prime is 28195653847. The reversal of 28195653841 is 14835659182.

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 22224846400 + 5970807441 = 149080^2 + 77271^2 .

It is not a de Polignac number, because 28195653841 - 2¹⁵ = 28195621073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28195653847) 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, 829283920 + ... + 829283953.

It is an arithmetic number, because the mean of its divisors is an integer number (7463555433).

Almost surely, 2^28195653841 is an apocalyptic number.

It is an amenable number.

28195653841 is a deficient number, since it is larger than the sum of its proper divisors (1658567891).

28195653841 is a wasteful number, since it uses less digits than its factorization.

28195653841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1658567890.

The product of its digits is 2073600, while the sum is 52.

The spelling of 28195653841 in words is "twenty-eight billion, one hundred ninety-five million, six hundred fifty-three thousand, eight hundred forty-one".