27828986249 has 2 divisors, whose sum is σ = 27828986250. Its totient is φ = 27828986248.

The previous prime is 27828986243. The next prime is 27828986267. The reversal of 27828986249 is 94268982872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26865504649 + 963481600 = 163907^2 + 31040^2 .

It is a cyclic number.

It is not a de Polignac number, because 27828986249 - 2⁸ = 27828985993 is a prime.

It is not a weakly prime, because it can be changed into another prime (27828986243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13914493124 + 13914493125.

It is an arithmetic number, because the mean of its divisors is an integer number (13914493125).

Almost surely, 2^27828986249 is an apocalyptic number.

It is an amenable number.

27828986249 is a deficient number, since it is larger than the sum of its proper divisors (1).

27828986249 is an equidigital number, since it uses as much as digits as its factorization.

27828986249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55738368, while the sum is 65.

The spelling of 27828986249 in words is "twenty-seven billion, eight hundred twenty-eight million, nine hundred eighty-six thousand, two hundred forty-nine".