27379323649 has 2 divisors, whose sum is σ = 27379323650. Its totient is φ = 27379323648.

The previous prime is 27379323637. The next prime is 27379323707. The reversal of 27379323649 is 94632397372.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27363776400 + 15547249 = 165420^2 + 3943^2 .

It is a cyclic number.

It is not a de Polignac number, because 27379323649 - 2⁵ = 27379323617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27379323649.

It is not a weakly prime, because it can be changed into another prime (27379321649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13689661824 + 13689661825.

It is an arithmetic number, because the mean of its divisors is an integer number (13689661825).

Almost surely, 2^27379323649 is an apocalyptic number.

It is an amenable number.

27379323649 is a deficient number, since it is larger than the sum of its proper divisors (1).

27379323649 is an equidigital number, since it uses as much as digits as its factorization.

27379323649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10287648, while the sum is 55.

The spelling of 27379323649 in words is "twenty-seven billion, three hundred seventy-nine million, three hundred twenty-three thousand, six hundred forty-nine".