28005025553 has 4 divisors (see below), whose sum is σ = 28006875648. Its totient is φ = 28003175460.

The previous prime is 28005025549. The next prime is 28005025579. The reversal of 28005025553 is 35552050082.

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 28005025553 - 2² = 28005025549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28005025513) 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, 902153 + ... + 932678.

It is an arithmetic number, because the mean of its divisors is an integer number (7001718912).

Almost surely, 2^28005025553 is an apocalyptic number.

It is an amenable number.

28005025553 is a deficient number, since it is larger than the sum of its proper divisors (1850095).

28005025553 is a wasteful number, since it uses less digits than its factorization.

28005025553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850094.

The product of its (nonzero) digits is 60000, while the sum is 35.

The spelling of 28005025553 in words is "twenty-eight billion, five million, twenty-five thousand, five hundred fifty-three".