185522300681 has 2 divisors, whose sum is σ = 185522300682. Its totient is φ = 185522300680.

The previous prime is 185522300641. The next prime is 185522300741. The reversal of 185522300681 is 186003225581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110949614281 + 74572686400 = 333091^2 + 273080^2 .

It is a cyclic number.

It is not a de Polignac number, because 185522300681 - 2³⁴ = 168342431497 is a prime.

It is a super-2 number, since 2×185522300681² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (185522300641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92761150340 + 92761150341.

It is an arithmetic number, because the mean of its divisors is an integer number (92761150341).

Almost surely, 2^185522300681 is an apocalyptic number.

It is an amenable number.

185522300681 is a deficient number, since it is larger than the sum of its proper divisors (1).

185522300681 is an equidigital number, since it uses as much as digits as its factorization.

185522300681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 115200, while the sum is 41.

Subtracting 185522300681 from its reverse (186003225581), we obtain a square (480924900 = 21930²).

The spelling of 185522300681 in words is "one hundred eighty-five billion, five hundred twenty-two million, three hundred thousand, six hundred eighty-one".