27440155121 has 2 divisors, whose sum is σ = 27440155122. Its totient is φ = 27440155120.

The previous prime is 27440155013. The next prime is 27440155213. The reversal of 27440155121 is 12155104472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16132810225 + 11307344896 = 127015^2 + 106336^2 .

It is a cyclic number.

It is not a de Polignac number, because 27440155121 - 2²² = 27435960817 is a prime.

It is a super-2 number, since 2×27440155121² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27440155621) 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, 13720077560 + 13720077561.

It is an arithmetic number, because the mean of its divisors is an integer number (13720077561).

Almost surely, 2^27440155121 is an apocalyptic number.

It is an amenable number.

27440155121 is a deficient number, since it is larger than the sum of its proper divisors (1).

27440155121 is an equidigital number, since it uses as much as digits as its factorization.

27440155121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11200, while the sum is 32.

Adding to 27440155121 its reverse (12155104472), we get a palindrome (39595259593).

The spelling of 27440155121 in words is "twenty-seven billion, four hundred forty million, one hundred fifty-five thousand, one hundred twenty-one".