27750000077 has 4 divisors (see below), whose sum is σ = 28395348960. Its totient is φ = 27104651196.

The previous prime is 27750000073. The next prime is 27750000079. The reversal of 27750000077 is 77000005772.

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 27750000077 - 2² = 27750000073 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 (27750000073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322674377 + ... + 322674462.

It is an arithmetic number, because the mean of its divisors is an integer number (7098837240).

Almost surely, 2^27750000077 is an apocalyptic number.

It is an amenable number.

27750000077 is a deficient number, since it is larger than the sum of its proper divisors (645348883).

27750000077 is an equidigital number, since it uses as much as digits as its factorization.

27750000077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645348882.

The product of its (nonzero) digits is 24010, while the sum is 35.

The spelling of 27750000077 in words is "twenty-seven billion, seven hundred fifty million, seventy-seven", and thus it is an aban number.