2128776619 has 4 divisors (see below), whose sum is σ = 2178283096. Its totient is φ = 2079270144.

The previous prime is 2128776589. The next prime is 2128776673. The reversal of 2128776619 is 9166778212.

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 2128776619 - 2⁷ = 2128776491 is a prime.

It is a super-2 number, since 2×2128776619² = 9063379787202142322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2128776119) 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, 24753174 + ... + 24753259.

It is an arithmetic number, because the mean of its divisors is an integer number (544570774).

Almost surely, 2^2128776619 is an apocalyptic number.

2128776619 is a deficient number, since it is larger than the sum of its proper divisors (49506477).

2128776619 is an equidigital number, since it uses as much as digits as its factorization.

2128776619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49506476.

The product of its digits is 508032, while the sum is 49.

The square root of 2128776619 is about 46138.6672867780. The cubic root of 2128776619 is about 1286.4019721000.

The spelling of 2128776619 in words is "two billion, one hundred twenty-eight million, seven hundred seventy-six thousand, six hundred nineteen".