27113687009 has 2 divisors, whose sum is σ = 27113687010. Its totient is φ = 27113687008.

The previous prime is 27113686993. The next prime is 27113687017. The reversal of 27113687009 is 90078631172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17948496784 + 9165190225 = 133972^2 + 95735^2 .

It is a cyclic number.

It is not a de Polignac number, because 27113687009 - 2⁴ = 27113686993 is a prime.

It is not a weakly prime, because it can be changed into another prime (27113687089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13556843504 + 13556843505.

It is an arithmetic number, because the mean of its divisors is an integer number (13556843505).

Almost surely, 2^27113687009 is an apocalyptic number.

It is an amenable number.

27113687009 is a deficient number, since it is larger than the sum of its proper divisors (1).

27113687009 is an equidigital number, since it uses as much as digits as its factorization.

27113687009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 44.

The spelling of 27113687009 in words is "twenty-seven billion, one hundred thirteen million, six hundred eighty-seven thousand, nine".