186112225561 has 2 divisors, whose sum is σ = 186112225562. Its totient is φ = 186112225560.

The previous prime is 186112225547. The next prime is 186112225573. The reversal of 186112225561 is 165522211681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131569425625 + 54542799936 = 362725^2 + 233544^2 .

It is an emirp because it is prime and its reverse (165522211681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 186112225561 - 2⁹ = 186112225049 is a prime.

It is not a weakly prime, because it can be changed into another prime (186112225501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93056112780 + 93056112781.

It is an arithmetic number, because the mean of its divisors is an integer number (93056112781).

Almost surely, 2^186112225561 is an apocalyptic number.

It is an amenable number.

186112225561 is a deficient number, since it is larger than the sum of its proper divisors (1).

186112225561 is an equidigital number, since it uses as much as digits as its factorization.

186112225561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57600, while the sum is 40.

The spelling of 186112225561 in words is "one hundred eighty-six billion, one hundred twelve million, two hundred twenty-five thousand, five hundred sixty-one".