28500553251 has 24 divisors (see below), whose sum is σ = 42294193344. Its totient is φ = 18480683520.

The previous prime is 28500553231. The next prime is 28500553259. The reversal of 28500553251 is 15235500582.

28500553251 is a `hidden beast` number, since 2 + 8 + 50 + 0 + 553 + 2 + 51 = 666.

It is not a de Polignac number, because 28500553251 - 2⁵ = 28500553219 is a prime.

It is a super-2 number, since 2×28500553251² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28500553259) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1121971 + ... + 1147091.

It is an arithmetic number, because the mean of its divisors is an integer number (1762258056).

Almost surely, 2^28500553251 is an apocalyptic number.

28500553251 is a deficient number, since it is larger than the sum of its proper divisors (13793640093).

28500553251 is a wasteful number, since it uses less digits than its factorization.

28500553251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28571 (or 28568 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

The spelling of 28500553251 in words is "twenty-eight billion, five hundred million, five hundred fifty-three thousand, two hundred fifty-one".