2638042663 has 2 divisors, whose sum is σ = 2638042664. Its totient is φ = 2638042662.

The previous prime is 2638042651. The next prime is 2638042679. The reversal of 2638042663 is 3662408362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2638042663 - 2⁹ = 2638042151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2638042163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319021331 + 1319021332.

It is an arithmetic number, because the mean of its divisors is an integer number (1319021332).

Almost surely, 2^2638042663 is an apocalyptic number.

2638042663 is a deficient number, since it is larger than the sum of its proper divisors (1).

2638042663 is an equidigital number, since it uses as much as digits as its factorization.

2638042663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 40.

The square root of 2638042663 is about 51361.8794730099. The cubic root of 2638042663 is about 1381.7429952130.

The spelling of 2638042663 in words is "two billion, six hundred thirty-eight million, forty-two thousand, six hundred sixty-three".