2538649819 has 2 divisors, whose sum is σ = 2538649820. Its totient is φ = 2538649818.

The previous prime is 2538649811. The next prime is 2538649823. The reversal of 2538649819 is 9189468352.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2538649819 - 2³ = 2538649811 is a prime.

It is a super-4 number, since 4×2538649819⁴ (a number of 39 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 2538649819.

It is not a weakly prime, because it can be changed into another prime (2538649811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1269324909 + 1269324910.

It is an arithmetic number, because the mean of its divisors is an integer number (1269324910).

Almost surely, 2^2538649819 is an apocalyptic number.

2538649819 is a deficient number, since it is larger than the sum of its proper divisors (1).

2538649819 is an equidigital number, since it uses as much as digits as its factorization.

2538649819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3732480, while the sum is 55.

The square root of 2538649819 is about 50385.0158181974. The cubic root of 2538649819 is about 1364.1671885017.

The spelling of 2538649819 in words is "two billion, five hundred thirty-eight million, six hundred forty-nine thousand, eight hundred nineteen".