27821263064 has 32 divisors (see below), whose sum is σ = 59697753600. Its totient is φ = 11907246240.

The previous prime is 27821263061. The next prime is 27821263087. The reversal of 27821263064 is 46036212872.

It is a super-4 number, since 4×27821263064⁴ (a number of 43 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27821263061) 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 7 ways as a sum of consecutive naturals, for example, 294752 + ... + 377519.

It is an arithmetic number, because the mean of its divisors is an integer number (1865554800).

Almost surely, 2^27821263064 is an apocalyptic number.

It is an amenable number.

27821263064 is an abundant number, since it is smaller than the sum of its proper divisors (31876490536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27821263064 is a wasteful number, since it uses less digits than its factorization.

27821263064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673023 (or 673019 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 41.

The spelling of 27821263064 in words is "twenty-seven billion, eight hundred twenty-one million, two hundred sixty-three thousand, sixty-four".