4985632181 has 2 divisors, whose sum is σ = 4985632182. Its totient is φ = 4985632180.

The previous prime is 4985632147. The next prime is 4985632187. The reversal of 4985632181 is 1812365894.

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., 3496829956 + 1488802225 = 59134^2 + 38585^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4985632181 is a prime.

It is a super-2 number, since 2×4985632181² = 49713056488445633522, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4985632187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2492816090 + 2492816091.

It is an arithmetic number, because the mean of its divisors is an integer number (2492816091).

Almost surely, 2^4985632181 is an apocalyptic number.

It is an amenable number.

4985632181 is a deficient number, since it is larger than the sum of its proper divisors (1).

4985632181 is an equidigital number, since it uses as much as digits as its factorization.

4985632181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 414720, while the sum is 47.

The square root of 4985632181 is about 70609.0092056247. The cubic root of 4985632181 is about 1708.3364669629.

The spelling of 4985632181 in words is "four billion, nine hundred eighty-five million, six hundred thirty-two thousand, one hundred eighty-one".