11615365022561 has 4 divisors (see below), whose sum is σ = 12298621788612. Its totient is φ = 10932108256512.

The previous prime is 11615365022543. The next prime is 11615365022579. The reversal of 11615365022561 is 16522056351611.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (11615365022543) and next prime (11615365022579).

It can be written as a sum of positive squares in 2 ways, for example, as 7016570552161 + 4598794470400 = 2648881^2 + 2144480^2 .

It is a cyclic number.

It is not a de Polignac number, because 11615365022561 - 2¹⁰ = 11615365021537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11615365022531) 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 in 3 ways as a sum of consecutive naturals, for example, 341628383000 + ... + 341628383033.

It is an arithmetic number, because the mean of its divisors is an integer number (3074655447153).

Almost surely, 2^{11615365022561} is an apocalyptic number.

It is an amenable number.

11615365022561 is a deficient number, since it is larger than the sum of its proper divisors (683256766051).

11615365022561 is an equidigital number, since it uses as much as digits as its factorization.

11615365022561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683256766050.

The product of its (nonzero) digits is 324000, while the sum is 44.

The spelling of 11615365022561 in words is "eleven trillion, six hundred fifteen billion, three hundred sixty-five million, twenty-two thousand, five hundred sixty-one".