2639194841 has 2 divisors, whose sum is σ = 2639194842. Its totient is φ = 2639194840.

The previous prime is 2639194813. The next prime is 2639194849. The reversal of 2639194841 is 1484919362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1756867225 + 882327616 = 41915^2 + 29704^2 .

It is a cyclic number.

It is not a de Polignac number, because 2639194841 - 2¹⁴ = 2639178457 is a prime.

It is a super-2 number, since 2×2639194841² = 13930698817522030562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2639194849) 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 as a sum of consecutive naturals, namely, 1319597420 + 1319597421.

It is an arithmetic number, because the mean of its divisors is an integer number (1319597421).

Almost surely, 2^2639194841 is an apocalyptic number.

It is an amenable number.

2639194841 is a deficient number, since it is larger than the sum of its proper divisors (1).

2639194841 is an equidigital number, since it uses as much as digits as its factorization.

2639194841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 47.

The square root of 2639194841 is about 51373.0945242741. The cubic root of 2639194841 is about 1381.9441269316.

The spelling of 2639194841 in words is "two billion, six hundred thirty-nine million, one hundred ninety-four thousand, eight hundred forty-one".