28201132457 has 2 divisors, whose sum is σ = 28201132458. Its totient is φ = 28201132456.

The previous prime is 28201132429. The next prime is 28201132607. The reversal of 28201132457 is 75423110282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22537215376 + 5663917081 = 150124^2 + 75259^2 .

It is a cyclic number.

It is not a de Polignac number, because 28201132457 - 2¹⁰ = 28201131433 is a prime.

It is not a weakly prime, because it can be changed into another prime (28201132417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14100566228 + 14100566229.

It is an arithmetic number, because the mean of its divisors is an integer number (14100566229).

Almost surely, 2^28201132457 is an apocalyptic number.

It is an amenable number.

28201132457 is a deficient number, since it is larger than the sum of its proper divisors (1).

28201132457 is an equidigital number, since it uses as much as digits as its factorization.

28201132457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 35.

The spelling of 28201132457 in words is "twenty-eight billion, two hundred one million, one hundred thirty-two thousand, four hundred fifty-seven".