28509296201 has 2 divisors, whose sum is σ = 28509296202. Its totient is φ = 28509296200.

The previous prime is 28509295963. The next prime is 28509296243. The reversal of 28509296201 is 10269290582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24632988601 + 3876307600 = 156949^2 + 62260^2 .

It is a cyclic number.

It is not a de Polignac number, because 28509296201 - 2²² = 28505101897 is a prime.

It is not a weakly prime, because it can be changed into another prime (28509296281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14254648100 + 14254648101.

It is an arithmetic number, because the mean of its divisors is an integer number (14254648101).

Almost surely, 2^28509296201 is an apocalyptic number.

It is an amenable number.

28509296201 is a deficient number, since it is larger than the sum of its proper divisors (1).

28509296201 is an equidigital number, since it uses as much as digits as its factorization.

28509296201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 44.

The spelling of 28509296201 in words is "twenty-eight billion, five hundred nine million, two hundred ninety-six thousand, two hundred one".