11215623553 has 2 divisors, whose sum is σ = 11215623554. Its totient is φ = 11215623552.

The previous prime is 11215623539. The next prime is 11215623569. The reversal of 11215623553 is 35532651211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9426079744 + 1789543809 = 97088^2 + 42303^2 .

It is an emirp because it is prime and its reverse (35532651211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11215623553 - 2¹⁷ = 11215492481 is a prime.

It is not a weakly prime, because it can be changed into another prime (11215623593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5607811776 + 5607811777.

It is an arithmetic number, because the mean of its divisors is an integer number (5607811777).

Almost surely, 2^11215623553 is an apocalyptic number.

It is an amenable number.

11215623553 is a deficient number, since it is larger than the sum of its proper divisors (1).

11215623553 is an equidigital number, since it uses as much as digits as its factorization.

11215623553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27000, while the sum is 34.

The spelling of 11215623553 in words is "eleven billion, two hundred fifteen million, six hundred twenty-three thousand, five hundred fifty-three".