27927787639 has 2 divisors, whose sum is σ = 27927787640. Its totient is φ = 27927787638.

The previous prime is 27927787633. The next prime is 27927787691. The reversal of 27927787639 is 93678772972.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27927787639 - 2³ = 27927787631 is a prime.

It is a super-2 number, since 2×27927787639² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27927787631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13963893819 + 13963893820.

It is an arithmetic number, because the mean of its divisors is an integer number (13963893820).

Almost surely, 2^27927787639 is an apocalyptic number.

27927787639 is a deficient number, since it is larger than the sum of its proper divisors (1).

27927787639 is an equidigital number, since it uses as much as digits as its factorization.

27927787639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112021056, while the sum is 67.

The spelling of 27927787639 in words is "twenty-seven billion, nine hundred twenty-seven million, seven hundred eighty-seven thousand, six hundred thirty-nine".