2638042671 has 16 divisors (see below), whose sum is σ = 3838779648. Its totient is φ = 1598136000.

The previous prime is 2638042663. The next prime is 2638042679. The reversal of 2638042671 is 1762408362.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2638042663) and next prime (2638042679).

It is not a de Polignac number, because 2638042671 - 2³ = 2638042663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2638042679) 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 15 ways as a sum of consecutive naturals, for example, 68515 + ... + 99851.

It is an arithmetic number, because the mean of its divisors is an integer number (239923728).

Almost surely, 2^2638042671 is an apocalyptic number.

2638042671 is a deficient number, since it is larger than the sum of its proper divisors (1200736977).

2638042671 is a wasteful number, since it uses less digits than its factorization.

2638042671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33902.

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 2638042671 is about 51361.8795508887. The cubic root of 2638042671 is about 1381.7429966097.

The spelling of 2638042671 in words is "two billion, six hundred thirty-eight million, forty-two thousand, six hundred seventy-one".