28641550271 has 4 divisors (see below), whose sum is σ = 29111083944. Its totient is φ = 28172016600.

The previous prime is 28641550213. The next prime is 28641550283. The reversal of 28641550271 is 17205514682.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28641550271 - 2²⁶ = 28574441407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28641550211) 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, 234766745 + ... + 234766866.

It is an arithmetic number, because the mean of its divisors is an integer number (7277770986).

Almost surely, 2^28641550271 is an apocalyptic number.

28641550271 is a deficient number, since it is larger than the sum of its proper divisors (469533673).

28641550271 is an equidigital number, since it uses as much as digits as its factorization.

28641550271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469533672.

The product of its (nonzero) digits is 134400, while the sum is 41.

The spelling of 28641550271 in words is "twenty-eight billion, six hundred forty-one million, five hundred fifty thousand, two hundred seventy-one".