27726680447 has 2 divisors, whose sum is σ = 27726680448. Its totient is φ = 27726680446.

The previous prime is 27726680407. The next prime is 27726680467. The reversal of 27726680447 is 74408662772.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27726680447 is a prime.

It is a super-2 number, since 2×27726680447² (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 (27726680407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13863340223 + 13863340224.

It is an arithmetic number, because the mean of its divisors is an integer number (13863340224).

Almost surely, 2^27726680447 is an apocalyptic number.

27726680447 is a deficient number, since it is larger than the sum of its proper divisors (1).

27726680447 is an equidigital number, since it uses as much as digits as its factorization.

27726680447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6322176, while the sum is 53.

The spelling of 27726680447 in words is "twenty-seven billion, seven hundred twenty-six million, six hundred eighty thousand, four hundred forty-seven".