27621068287 has 2 divisors, whose sum is σ = 27621068288. Its totient is φ = 27621068286.

The previous prime is 27621068273. The next prime is 27621068309. The reversal of 27621068287 is 78286012672.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27621068287 is a prime.

It is a super-2 number, since 2×27621068287² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27621068287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27621065287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13810534143 + 13810534144.

It is an arithmetic number, because the mean of its divisors is an integer number (13810534144).

Almost surely, 2^27621068287 is an apocalyptic number.

27621068287 is a deficient number, since it is larger than the sum of its proper divisors (1).

27621068287 is an equidigital number, since it uses as much as digits as its factorization.

27621068287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 903168, while the sum is 49.

The spelling of 27621068287 in words is "twenty-seven billion, six hundred twenty-one million, sixty-eight thousand, two hundred eighty-seven".