27730220773 has 4 divisors (see below), whose sum is σ = 27730737280. Its totient is φ = 27729704268.

The previous prime is 27730220753. The next prime is 27730220783. The reversal of 27730220773 is 37702203772.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27730220773 - 2⁹ = 27730220261 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 (27730220723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166965 + ... + 288682.

It is an arithmetic number, because the mean of its divisors is an integer number (6932684320).

Almost surely, 2^27730220773 is an apocalyptic number.

It is an amenable number.

27730220773 is a deficient number, since it is larger than the sum of its proper divisors (516507).

27730220773 is an equidigital number, since it uses as much as digits as its factorization.

27730220773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516506.

The product of its (nonzero) digits is 172872, while the sum is 40.

The spelling of 27730220773 in words is "twenty-seven billion, seven hundred thirty million, two hundred twenty thousand, seven hundred seventy-three".