27821564313 has 8 divisors (see below), whose sum is σ = 38708263488. Its totient is φ = 17741287344.

The previous prime is 27821564311. The next prime is 27821564339. The reversal of 27821564313 is 31346512872.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27821564313 - 2¹ = 27821564311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27821564311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201605470 + ... + 201605607.

It is an arithmetic number, because the mean of its divisors is an integer number (4838532936).

Almost surely, 2^27821564313 is an apocalyptic number.

27821564313 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

27821564313 is a deficient number, since it is larger than the sum of its proper divisors (10886699175).

27821564313 is a wasteful number, since it uses less digits than its factorization.

27821564313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403211103.

The product of its digits is 241920, while the sum is 42.

The spelling of 27821564313 in words is "twenty-seven billion, eight hundred twenty-one million, five hundred sixty-four thousand, three hundred thirteen".