28025307553 has 4 divisors (see below), whose sum is σ = 29500323760. Its totient is φ = 26550291348.

The previous prime is 28025307547. The next prime is 28025307581. The reversal of 28025307553 is 35570352082.

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 a de Polignac number, because none of the positive numbers 2^k-28025307553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28025304553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 737508075 + ... + 737508112.

It is an arithmetic number, because the mean of its divisors is an integer number (7375080940).

Almost surely, 2^28025307553 is an apocalyptic number.

It is an amenable number.

28025307553 is a deficient number, since it is larger than the sum of its proper divisors (1475016207).

28025307553 is a wasteful number, since it uses less digits than its factorization.

28025307553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475016206.

The product of its (nonzero) digits is 252000, while the sum is 40.

The spelling of 28025307553 in words is "twenty-eight billion, twenty-five million, three hundred seven thousand, five hundred fifty-three".