4128776123 has 4 divisors (see below), whose sum is σ = 4138181520. Its totient is φ = 4119370728.

The previous prime is 4128776101. The next prime is 4128776159. The reversal of 4128776123 is 3216778214.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4128776123 - 2¹⁶ = 4128710587 is a prime.

It is a super-2 number, since 2×4128776123² = 34093584547709822258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4128776173) 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 in 3 ways as a sum of consecutive naturals, for example, 4702040 + ... + 4702917.

It is an arithmetic number, because the mean of its divisors is an integer number (1034545380).

Almost surely, 2^4128776123 is an apocalyptic number.

4128776123 is a deficient number, since it is larger than the sum of its proper divisors (9405397).

4128776123 is an equidigital number, since it uses as much as digits as its factorization.

4128776123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9405396.

The product of its digits is 112896, while the sum is 41.

The square root of 4128776123 is about 64255.5532463926. The cubic root of 4128776123 is about 1604.2563912666.

The spelling of 4128776123 in words is "four billion, one hundred twenty-eight million, seven hundred seventy-six thousand, one hundred twenty-three".