27726016639 has 2 divisors, whose sum is σ = 27726016640. Its totient is φ = 27726016638.

The previous prime is 27726016603. The next prime is 27726016651. The reversal of 27726016639 is 93661062772.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27726016639 is a prime.

It is a super-2 number, since 2×27726016639² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27726016592 and 27726016601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27726010639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13863008319 + 13863008320.

It is an arithmetic number, because the mean of its divisors is an integer number (13863008320).

Almost surely, 2^27726016639 is an apocalyptic number.

27726016639 is a deficient number, since it is larger than the sum of its proper divisors (1).

27726016639 is an equidigital number, since it uses as much as digits as its factorization.

27726016639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1143072, while the sum is 49.

The spelling of 27726016639 in words is "twenty-seven billion, seven hundred twenty-six million, sixteen thousand, six hundred thirty-nine".