27770750821 has 8 divisors (see below), whose sum is σ = 31114158624. Its totient is φ = 24563808720.

The previous prime is 27770750729. The next prime is 27770750849. The reversal of 27770750821 is 12805707772.

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

It is not a de Polignac number, because 27770750821 - 2⁹ = 27770750309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27770750221) 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, 34115995 + ... + 34116808.

It is an arithmetic number, because the mean of its divisors is an integer number (3889269828).

Almost surely, 2^27770750821 is an apocalyptic number.

It is an amenable number.

27770750821 is a deficient number, since it is larger than the sum of its proper divisors (3343407803).

27770750821 is a wasteful number, since it uses less digits than its factorization.

27770750821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68232851.

The product of its (nonzero) digits is 384160, while the sum is 46.

The spelling of 27770750821 in words is "twenty-seven billion, seven hundred seventy million, seven hundred fifty thousand, eight hundred twenty-one".