27921073216 has 21 divisors (see below), whose sum is σ = 55408532439. Its totient is φ = 13959868224.

The previous prime is 27921073199. The next prime is 27921073217. The reversal of 27921073216 is 61237012972.

The square root of 27921073216 is 167096.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27921073217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1326325 + ... + 1347211.

Almost surely, 2^27921073216 is an apocalyptic number.

27921073216 is the 167096-th square number.

It is an amenable number.

27921073216 is a deficient number, since it is larger than the sum of its proper divisors (27487459223).

27921073216 is an frugal number, since it uses more digits than its factorization.

27921073216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41786 (or 20889 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 40.

The spelling of 27921073216 in words is "twenty-seven billion, nine hundred twenty-one million, seventy-three thousand, two hundred sixteen".