28247118631009 has 2 divisors, whose sum is σ = 28247118631010. Its totient is φ = 28247118631008.

The previous prime is 28247118630971. The next prime is 28247118631031. The reversal of 28247118631009 is 90013681174282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23669538568225 + 4577580062784 = 4865135^2 + 2139528^2 .

It is a cyclic number.

It is not a de Polignac number, because 28247118631009 - 2¹⁷ = 28247118499937 is a prime.

It is not a weakly prime, because it can be changed into another prime (28247118631079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14123559315504 + 14123559315505.

It is an arithmetic number, because the mean of its divisors is an integer number (14123559315505).

Almost surely, 2^{28247118631009} is an apocalyptic number.

It is an amenable number.

28247118631009 is a deficient number, since it is larger than the sum of its proper divisors (1).

28247118631009 is an equidigital number, since it uses as much as digits as its factorization.

28247118631009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1161216, while the sum is 52.

The spelling of 28247118631009 in words is "twenty-eight trillion, two hundred forty-seven billion, one hundred eighteen million, six hundred thirty-one thousand, nine".