28510113553 has 4 divisors (see below), whose sum is σ = 28514908708. Its totient is φ = 28505318400.

The previous prime is 28510113521. The next prime is 28510113559. The reversal of 28510113553 is 35531101582.

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 328769424 + 28181344129 = 18132^2 + 167873^2 .

It is a cyclic number.

It is not a de Polignac number, because 28510113553 - 2⁵ = 28510113521 is a prime.

It is a super-3 number, since 3×28510113553³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28510113559) 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, 2388648 + ... + 2400553.

It is an arithmetic number, because the mean of its divisors is an integer number (7128727177).

Almost surely, 2^28510113553 is an apocalyptic number.

It is an amenable number.

28510113553 is a deficient number, since it is larger than the sum of its proper divisors (4795155).

28510113553 is an equidigital number, since it uses as much as digits as its factorization.

28510113553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4795154.

The product of its (nonzero) digits is 18000, while the sum is 34.

The spelling of 28510113553 in words is "twenty-eight billion, five hundred ten million, one hundred thirteen thousand, five hundred fifty-three".