4055661509 has 2 divisors, whose sum is σ = 4055661510. Its totient is φ = 4055661508.

The previous prime is 4055661499. The next prime is 4055661527. The reversal of 4055661509 is 9051665504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3937939009 + 117722500 = 62753^2 + 10850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4055661509 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4055661569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2027830754 + 2027830755.

It is an arithmetic number, because the mean of its divisors is an integer number (2027830755).

Almost surely, 2^4055661509 is an apocalyptic number.

It is an amenable number.

4055661509 is a deficient number, since it is larger than the sum of its proper divisors (1).

4055661509 is an equidigital number, since it uses as much as digits as its factorization.

4055661509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162000, while the sum is 41.

The square root of 4055661509 is about 63684.0757882220. The cubic root of 4055661509 is about 1594.7302549899.

The spelling of 4055661509 in words is "four billion, fifty-five million, six hundred sixty-one thousand, five hundred nine".