4155128755669 has 2 divisors, whose sum is σ = 4155128755670. Its totient is φ = 4155128755668.

The previous prime is 4155128755649. The next prime is 4155128755711. The reversal of 4155128755669 is 9665578215514.

4155128755669 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3896162776900 + 258965978769 = 1973870^2 + 508887^2 .

It is a cyclic number.

It is not a de Polignac number, because 4155128755669 - 2⁷ = 4155128755541 is a prime.

It is a super-2 number, since 2×4155128755669² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4155128755669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4155128755649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2077564377834 + 2077564377835.

It is an arithmetic number, because the mean of its divisors is an integer number (2077564377835).

Almost surely, 2^{4155128755669} is an apocalyptic number.

It is an amenable number.

4155128755669 is a deficient number, since it is larger than the sum of its proper divisors (1).

4155128755669 is an equidigital number, since it uses as much as digits as its factorization.

4155128755669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720000, while the sum is 64.

The spelling of 4155128755669 in words is "four trillion, one hundred fifty-five billion, one hundred twenty-eight million, seven hundred fifty-five thousand, six hundred sixty-nine".