15455535521281 has 2 divisors, whose sum is σ = 15455535521282. Its totient is φ = 15455535521280.

The previous prime is 15455535521263. The next prime is 15455535521323. The reversal of 15455535521281 is 18212553555451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13072707984400 + 2382827536881 = 3615620^2 + 1543641^2 .

It is a cyclic number.

It is not a de Polignac number, because 15455535521281 - 2¹¹ = 15455535519233 is a prime.

It is a super-2 number, since 2×15455535521281² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15455535521381) 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, 7727767760640 + 7727767760641.

It is an arithmetic number, because the mean of its divisors is an integer number (7727767760641).

Almost surely, 2^{15455535521281} is an apocalyptic number.

It is an amenable number.

15455535521281 is a deficient number, since it is larger than the sum of its proper divisors (1).

15455535521281 is an equidigital number, since it uses as much as digits as its factorization.

15455535521281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6000000, while the sum is 52.

The spelling of 15455535521281 in words is "fifteen trillion, four hundred fifty-five billion, five hundred thirty-five million, five hundred twenty-one thousand, two hundred eighty-one".