28809718001 has 2 divisors, whose sum is σ = 28809718002. Its totient is φ = 28809718000.

The previous prime is 28809717961. The next prime is 28809718043. The reversal of 28809718001 is 10081790882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22634901601 + 6174816400 = 150449^2 + 78580^2 .

It is a cyclic number.

It is not a de Polignac number, because 28809718001 - 2²² = 28805523697 is a prime.

It is not a weakly prime, because it can be changed into another prime (28809715001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14404859000 + 14404859001.

It is an arithmetic number, because the mean of its divisors is an integer number (14404859001).

Almost surely, 2^28809718001 is an apocalyptic number.

It is an amenable number.

28809718001 is a deficient number, since it is larger than the sum of its proper divisors (1).

28809718001 is an equidigital number, since it uses as much as digits as its factorization.

28809718001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 44.

The spelling of 28809718001 in words is "twenty-eight billion, eight hundred nine million, seven hundred eighteen thousand, one".