28572716101 has 4 divisors (see below), whose sum is σ = 28638704332. Its totient is φ = 28506727872.

The previous prime is 28572716087. The next prime is 28572716111. The reversal of 28572716101 is 10161727582.

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 12905187201 + 15667528900 = 113601^2 + 125170^2 .

It is a cyclic number.

It is not a de Polignac number, because 28572716101 - 2⁷ = 28572715973 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 (28572716111) 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, 32993466 + ... + 32994331.

It is an arithmetic number, because the mean of its divisors is an integer number (7159676083).

Almost surely, 2^28572716101 is an apocalyptic number.

It is an amenable number.

28572716101 is a deficient number, since it is larger than the sum of its proper divisors (65988231).

28572716101 is an equidigital number, since it uses as much as digits as its factorization.

28572716101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65988230.

The product of its (nonzero) digits is 47040, while the sum is 40.

The spelling of 28572716101 in words is "twenty-eight billion, five hundred seventy-two million, seven hundred sixteen thousand, one hundred one".