27621623297 has 2 divisors, whose sum is σ = 27621623298. Its totient is φ = 27621623296.

The previous prime is 27621623257. The next prime is 27621623321. The reversal of 27621623297 is 79232612672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18693452176 + 8928171121 = 136724^2 + 94489^2 .

It is a cyclic number.

It is not a de Polignac number, because 27621623297 - 2¹⁸ = 27621361153 is a prime.

It is a super-2 number, since 2×27621623297² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27621623257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13810811648 + 13810811649.

It is an arithmetic number, because the mean of its divisors is an integer number (13810811649).

Almost surely, 2^27621623297 is an apocalyptic number.

It is an amenable number.

27621623297 is a deficient number, since it is larger than the sum of its proper divisors (1).

27621623297 is an equidigital number, since it uses as much as digits as its factorization.

27621623297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 47.

The spelling of 27621623297 in words is "twenty-seven billion, six hundred twenty-one million, six hundred twenty-three thousand, two hundred ninety-seven".