11652611561 has 2 divisors, whose sum is σ = 11652611562. Its totient is φ = 11652611560.

The previous prime is 11652611533. The next prime is 11652611567. The reversal of 11652611561 is 16511625611.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11208245161 + 444366400 = 105869^2 + 21080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11652611561 is a prime.

It is not a weakly prime, because it can be changed into another prime (11652611567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5826305780 + 5826305781.

It is an arithmetic number, because the mean of its divisors is an integer number (5826305781).

Almost surely, 2^11652611561 is an apocalyptic number.

It is an amenable number.

11652611561 is a deficient number, since it is larger than the sum of its proper divisors (1).

11652611561 is an equidigital number, since it uses as much as digits as its factorization.

11652611561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 35.

The spelling of 11652611561 in words is "eleven billion, six hundred fifty-two million, six hundred eleven thousand, five hundred sixty-one".