28205451711 has 48 divisors (see below), whose sum is σ = 42553085952. Its totient is φ = 17982518400.

The previous prime is 28205451679. The next prime is 28205451719. The reversal of 28205451711 is 11715450282.

It is a happy number.

28205451711 is a `hidden beast` number, since 2 + 82 + 0 + 54 + 517 + 11 = 666.

It is not a de Polignac number, because 28205451711 - 2⁵ = 28205451679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28205451719) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21350931 + ... + 21352251.

It is an arithmetic number, because the mean of its divisors is an integer number (886522624).

Almost surely, 2^28205451711 is an apocalyptic number.

28205451711 is a deficient number, since it is larger than the sum of its proper divisors (14347634241).

28205451711 is a wasteful number, since it uses less digits than its factorization.

28205451711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2204 (or 2201 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The spelling of 28205451711 in words is "twenty-eight billion, two hundred five million, four hundred fifty-one thousand, seven hundred eleven".