27207307649 has 2 divisors, whose sum is σ = 27207307650. Its totient is φ = 27207307648.

The previous prime is 27207307639. The next prime is 27207307651. The reversal of 27207307649 is 94670370272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13980697600 + 13226610049 = 118240^2 + 115007^2 .

It is a cyclic number.

It is not a de Polignac number, because 27207307649 - 2¹⁶ = 27207242113 is a prime.

Together with 27207307651, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27207307639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13603653824 + 13603653825.

It is an arithmetic number, because the mean of its divisors is an integer number (13603653825).

Almost surely, 2^27207307649 is an apocalyptic number.

It is an amenable number.

27207307649 is a deficient number, since it is larger than the sum of its proper divisors (1).

27207307649 is an equidigital number, since it uses as much as digits as its factorization.

27207307649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 889056, while the sum is 47.

The spelling of 27207307649 in words is "twenty-seven billion, two hundred seven million, three hundred seven thousand, six hundred forty-nine".