4128985919 has 2 divisors, whose sum is σ = 4128985920. Its totient is φ = 4128985918.

The previous prime is 4128985841. The next prime is 4128985933. The reversal of 4128985919 is 9195898214.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4128985919 - 2¹² = 4128981823 is a prime.

It is a super-2 number, since 2×4128985919² = 34097049438600549122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4128985999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2064492959 + 2064492960.

It is an arithmetic number, because the mean of its divisors is an integer number (2064492960).

Almost surely, 2^4128985919 is an apocalyptic number.

4128985919 is a deficient number, since it is larger than the sum of its proper divisors (1).

4128985919 is an equidigital number, since it uses as much as digits as its factorization.

4128985919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 56.

The square root of 4128985919 is about 64257.1857382503. The cubic root of 4128985919 is about 1604.2835632310.

The spelling of 4128985919 in words is "four billion, one hundred twenty-eight million, nine hundred eighty-five thousand, nine hundred nineteen".