28673272801 has 4 divisors (see below), whose sum is σ = 28927018692. Its totient is φ = 28419526912.

The previous prime is 28673272783. The next prime is 28673272829. The reversal of 28673272801 is 10827237682.

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 14388242401 + 14285030400 = 119951^2 + 119520^2 .

It is a cyclic number.

It is not a de Polignac number, because 28673272801 - 2⁵ = 28673272769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28673272861) 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, 126872776 + ... + 126873001.

It is an arithmetic number, because the mean of its divisors is an integer number (7231754673).

Almost surely, 2^28673272801 is an apocalyptic number.

It is an amenable number.

28673272801 is a deficient number, since it is larger than the sum of its proper divisors (253745891).

28673272801 is a wasteful number, since it uses less digits than its factorization.

28673272801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253745890.

The product of its (nonzero) digits is 451584, while the sum is 46.

The spelling of 28673272801 in words is "twenty-eight billion, six hundred seventy-three million, two hundred seventy-two thousand, eight hundred one".