11615320553 has 2 divisors, whose sum is σ = 11615320554. Its totient is φ = 11615320552.

The previous prime is 11615320547. The next prime is 11615320573. The reversal of 11615320553 is 35502351611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9582843664 + 2032476889 = 97892^2 + 45083^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11615320553 is a prime.

It is not a weakly prime, because it can be changed into another prime (11615320573) 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, 5807660276 + 5807660277.

It is an arithmetic number, because the mean of its divisors is an integer number (5807660277).

Almost surely, 2^11615320553 is an apocalyptic number.

It is an amenable number.

11615320553 is a deficient number, since it is larger than the sum of its proper divisors (1).

11615320553 is an equidigital number, since it uses as much as digits as its factorization.

11615320553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13500, while the sum is 32.

The spelling of 11615320553 in words is "eleven billion, six hundred fifteen million, three hundred twenty thousand, five hundred fifty-three".