27321645064 has 64 divisors (see below), whose sum is σ = 62687001600. Its totient is φ = 10896635904.

The previous prime is 27321645031. The next prime is 27321645073. The reversal of 27321645064 is 46054612372.

It is an unprimeable number.

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, 76504 + ... + 245959.

It is an arithmetic number, because the mean of its divisors is an integer number (979484400).

Almost surely, 2^27321645064 is an apocalyptic number.

It is an amenable number.

27321645064 is an abundant number, since it is smaller than the sum of its proper divisors (35365356536).

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

27321645064 is a wasteful number, since it uses less digits than its factorization.

27321645064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322582 (or 322578 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 27321645064 in words is "twenty-seven billion, three hundred twenty-one million, six hundred forty-five thousand, sixty-four".