11250365561 has 2 divisors, whose sum is σ = 11250365562. Its totient is φ = 11250365560.

The previous prime is 11250365551. The next prime is 11250365579. The reversal of 11250365561 is 16556305211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9265217536 + 1985148025 = 96256^2 + 44555^2 .

It is a cyclic number.

It is not a de Polignac number, because 11250365561 - 2¹⁴ = 11250349177 is a prime.

It is a super-2 number, since 2×11250365561² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11250365551) 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, 5625182780 + 5625182781.

It is an arithmetic number, because the mean of its divisors is an integer number (5625182781).

Almost surely, 2^11250365561 is an apocalyptic number.

It is an amenable number.

11250365561 is a deficient number, since it is larger than the sum of its proper divisors (1).

11250365561 is an equidigital number, since it uses as much as digits as its factorization.

11250365561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 11250365561 in words is "eleven billion, two hundred fifty million, three hundred sixty-five thousand, five hundred sixty-one".