28575216101 has 4 divisors (see below), whose sum is σ = 28575560832. Its totient is φ = 28574871372.

The previous prime is 28575216073. The next prime is 28575216127. The reversal of 28575216101 is 10161257582.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28575216101 - 2¹⁰ = 28575215077 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 (28575216161) 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, 35660 + ... + 241706.

It is an arithmetic number, because the mean of its divisors is an integer number (7143890208).

Almost surely, 2^28575216101 is an apocalyptic number.

It is an amenable number.

28575216101 is a deficient number, since it is larger than the sum of its proper divisors (344731).

28575216101 is a wasteful number, since it uses less digits than its factorization.

28575216101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344730.

The product of its (nonzero) digits is 33600, while the sum is 38.

The spelling of 28575216101 in words is "twenty-eight billion, five hundred seventy-five million, two hundred sixteen thousand, one hundred one".