28409856653 has 16 divisors (see below), whose sum is σ = 29660432256. Its totient is φ = 27190882560.

The previous prime is 28409856619. The next prime is 28409856661. The reversal of 28409856653 is 35665890482.

It is a cyclic number.

It is not a de Polignac number, because 28409856653 - 2⁶ = 28409856589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28409856253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 420425 + ... + 483297.

It is an arithmetic number, because the mean of its divisors is an integer number (1853777016).

Almost surely, 2^28409856653 is an apocalyptic number.

It is an amenable number.

28409856653 is a deficient number, since it is larger than the sum of its proper divisors (1250575603).

28409856653 is a wasteful number, since it uses less digits than its factorization.

28409856653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63124.

The product of its (nonzero) digits is 12441600, while the sum is 56.

The spelling of 28409856653 in words is "twenty-eight billion, four hundred nine million, eight hundred fifty-six thousand, six hundred fifty-three".