27577653749 has 2 divisors, whose sum is σ = 27577653750. Its totient is φ = 27577653748.

The previous prime is 27577653739. The next prime is 27577653751. The reversal of 27577653749 is 94735677572.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25469925649 + 2107728100 = 159593^2 + 45910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27577653749 is a prime.

Together with 27577653751, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 27577653691 and 27577653700.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27577653709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13788826874 + 13788826875.

It is an arithmetic number, because the mean of its divisors is an integer number (13788826875).

Almost surely, 2^27577653749 is an apocalyptic number.

It is an amenable number.

27577653749 is a deficient number, since it is larger than the sum of its proper divisors (1).

27577653749 is an equidigital number, since it uses as much as digits as its factorization.

27577653749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77792400, while the sum is 62.

The spelling of 27577653749 in words is "twenty-seven billion, five hundred seventy-seven million, six hundred fifty-three thousand, seven hundred forty-nine".