3868155509 has 2 divisors, whose sum is σ = 3868155510. Its totient is φ = 3868155508.

The previous prime is 3868155497. The next prime is 3868155521. The reversal of 3868155509 is 9055518683.

It is a balanced prime because it is at equal distance from previous prime (3868155497) and next prime (3868155521).

It can be written as a sum of positive squares in only one way, i.e., 2130099409 + 1738056100 = 46153^2 + 41690^2 .

It is a cyclic number.

It is not a de Polignac number, because 3868155509 - 2⁸ = 3868155253 is a prime.

It is a super-3 number, since 3×3868155509³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3868155539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1934077754 + 1934077755.

It is an arithmetic number, because the mean of its divisors is an integer number (1934077755).

Almost surely, 2^3868155509 is an apocalyptic number.

It is an amenable number.

3868155509 is a deficient number, since it is larger than the sum of its proper divisors (1).

3868155509 is an equidigital number, since it uses as much as digits as its factorization.

3868155509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296000, while the sum is 50.

The square root of 3868155509 is about 62194.4974173761. The cubic root of 3868155509 is about 1569.7650004604.

The spelling of 3868155509 in words is "three billion, eight hundred sixty-eight million, one hundred fifty-five thousand, five hundred nine".