11555401397 has 2 divisors, whose sum is σ = 11555401398. Its totient is φ = 11555401396.

The previous prime is 11555401391. The next prime is 11555401421. The reversal of 11555401397 is 79310455511.

11555401397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8149395076 + 3406006321 = 90274^2 + 58361^2 .

It is a cyclic number.

It is not a de Polignac number, because 11555401397 - 2¹⁴ = 11555385013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11555401391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5777700698 + 5777700699.

It is an arithmetic number, because the mean of its divisors is an integer number (5777700699).

Almost surely, 2^11555401397 is an apocalyptic number.

It is an amenable number.

11555401397 is a deficient number, since it is larger than the sum of its proper divisors (1).

11555401397 is an equidigital number, since it uses as much as digits as its factorization.

11555401397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94500, while the sum is 41.

The spelling of 11555401397 in words is "eleven billion, five hundred fifty-five million, four hundred one thousand, three hundred ninety-seven".