27603787481 has 2 divisors, whose sum is σ = 27603787482. Its totient is φ = 27603787480.

The previous prime is 27603787447. The next prime is 27603787483. The reversal of 27603787481 is 18478730672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22081960000 + 5521827481 = 148600^2 + 74309^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27603787481 is a prime.

It is a super-2 number, since 2×27603787481² (a number of 22 digits) contains 22 as substring.

Together with 27603787483, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27603787483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13801893740 + 13801893741.

It is an arithmetic number, because the mean of its divisors is an integer number (13801893741).

Almost surely, 2^27603787481 is an apocalyptic number.

It is an amenable number.

27603787481 is a deficient number, since it is larger than the sum of its proper divisors (1).

27603787481 is an equidigital number, since it uses as much as digits as its factorization.

27603787481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3161088, while the sum is 53.

The spelling of 27603787481 in words is "twenty-seven billion, six hundred three million, seven hundred eighty-seven thousand, four hundred eighty-one".