27850864809 has 16 divisors (see below), whose sum is σ = 37237616640. Its totient is φ = 18515748240.

The previous prime is 27850864799. The next prime is 27850864819. The reversal of 27850864809 is 90846805872.

It is an interprime number because it is at equal distance from previous prime (27850864799) and next prime (27850864819).

It is not a de Polignac number, because 27850864809 - 2¹³ = 27850856617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27850864819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1737172 + ... + 1753130.

It is an arithmetic number, because the mean of its divisors is an integer number (2327351040).

Almost surely, 2^27850864809 is an apocalyptic number.

It is an amenable number.

27850864809 is a deficient number, since it is larger than the sum of its proper divisors (9386751831).

27850864809 is a wasteful number, since it uses less digits than its factorization.

27850864809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17540.

The product of its (nonzero) digits is 7741440, while the sum is 57.

The spelling of 27850864809 in words is "twenty-seven billion, eight hundred fifty million, eight hundred sixty-four thousand, eight hundred nine".