27899630401 has 2 divisors, whose sum is σ = 27899630402. Its totient is φ = 27899630400.

The previous prime is 27899630357. The next prime is 27899630491. The reversal of 27899630401 is 10403699872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27224670001 + 674960400 = 164999^2 + 25980^2 .

It is a cyclic number.

It is not a de Polignac number, because 27899630401 - 2⁹ = 27899629889 is a prime.

It is not a weakly prime, because it can be changed into another prime (27899630491) 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, 13949815200 + 13949815201.

It is an arithmetic number, because the mean of its divisors is an integer number (13949815201).

Almost surely, 2^27899630401 is an apocalyptic number.

It is an amenable number.

27899630401 is a deficient number, since it is larger than the sum of its proper divisors (1).

27899630401 is an equidigital number, since it uses as much as digits as its factorization.

27899630401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 27899630401 in words is "twenty-seven billion, eight hundred ninety-nine million, six hundred thirty thousand, four hundred one".