4081555693 has 2 divisors, whose sum is σ = 4081555694. Its totient is φ = 4081555692.

The previous prime is 4081555679. The next prime is 4081555703. The reversal of 4081555693 is 3965551804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4053486889 + 28068804 = 63667^2 + 5298^2 .

It is a cyclic number.

It is not a de Polignac number, because 4081555693 - 2¹⁷ = 4081424621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4081555663) 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, 2040777846 + 2040777847.

It is an arithmetic number, because the mean of its divisors is an integer number (2040777847).

Almost surely, 2^4081555693 is an apocalyptic number.

It is an amenable number.

4081555693 is a deficient number, since it is larger than the sum of its proper divisors (1).

4081555693 is an equidigital number, since it uses as much as digits as its factorization.

4081555693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648000, while the sum is 46.

The square root of 4081555693 is about 63887.0541894052. The cubic root of 4081555693 is about 1598.1170157100.

The spelling of 4081555693 in words is "four billion, eighty-one million, five hundred fifty-five thousand, six hundred ninety-three".