27790386823 has 4 divisors (see below), whose sum is σ = 27793224040. Its totient is φ = 27787549608.

The previous prime is 27790386797. The next prime is 27790386853. The reversal of 27790386823 is 32868309772.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27790386823 - 2⁹ = 27790386311 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 (27790386853) 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, 1403865 + ... + 1423522.

It is an arithmetic number, because the mean of its divisors is an integer number (6948306010).

Almost surely, 2^27790386823 is an apocalyptic number.

27790386823 is a deficient number, since it is larger than the sum of its proper divisors (2837217).

27790386823 is an equidigital number, since it uses as much as digits as its factorization.

27790386823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2837216.

The product of its (nonzero) digits is 6096384, while the sum is 55.

The spelling of 27790386823 in words is "twenty-seven billion, seven hundred ninety million, three hundred eighty-six thousand, eight hundred twenty-three".