2641918249 has 4 divisors (see below), whose sum is σ = 2642194260. Its totient is φ = 2641642240.

The previous prime is 2641918231. The next prime is 2641918261. The reversal of 2641918249 is 9428191462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9428191462 = 2 ⋅4714095731.

It can be written as a sum of positive squares in 2 ways, for example, as 380250000 + 2261668249 = 19500^2 + 47557^2 .

It is a cyclic number.

It is not a de Polignac number, because 2641918249 - 2⁷ = 2641918121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2641918199 and 2641918208.

It is not an unprimeable number, because it can be changed into a prime (2641918219) 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 in 3 ways as a sum of consecutive naturals, for example, 123112 + ... + 142969.

It is an arithmetic number, because the mean of its divisors is an integer number (660548565).

Almost surely, 2^2641918249 is an apocalyptic number.

It is an amenable number.

2641918249 is a deficient number, since it is larger than the sum of its proper divisors (276011).

2641918249 is an equidigital number, since it uses as much as digits as its factorization.

2641918249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276010.

The product of its digits is 248832, while the sum is 46.

The square root of 2641918249 is about 51399.5938602631. The cubic root of 2641918249 is about 1382.4193102225.

The spelling of 2641918249 in words is "two billion, six hundred forty-one million, nine hundred eighteen thousand, two hundred forty-nine".