11155651601 has 2 divisors, whose sum is σ = 11155651602. Its totient is φ = 11155651600.

The previous prime is 11155651571. The next prime is 11155651609. The reversal of 11155651601 is 10615655111.

11155651601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11151571201 + 4080400 = 105601^2 + 2020^2 .

It is an emirp because it is prime and its reverse (10615655111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11155651601 is a prime.

It is not a weakly prime, because it can be changed into another prime (11155651609) 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, 5577825800 + 5577825801.

It is an arithmetic number, because the mean of its divisors is an integer number (5577825801).

Almost surely, 2^11155651601 is an apocalyptic number.

It is an amenable number.

11155651601 is a deficient number, since it is larger than the sum of its proper divisors (1).

11155651601 is an equidigital number, since it uses as much as digits as its factorization.

11155651601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4500, while the sum is 32.

The spelling of 11155651601 in words is "eleven billion, one hundred fifty-five million, six hundred fifty-one thousand, six hundred one".