6638535106 has 16 divisors (see below), whose sum is σ = 11383709760. Its totient is φ = 2844245520.

The previous prime is 6638535053. The next prime is 6638535109. The reversal of 6638535106 is 6015358366.

It is not an unprimeable number, because it can be changed into a prime (6638535109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19780 + ... + 116911.

It is an arithmetic number, because the mean of its divisors is an integer number (711481860).

Almost surely, 2^6638535106 is an apocalyptic number.

6638535106 is a deficient number, since it is larger than the sum of its proper divisors (4745174654).

6638535106 is a wasteful number, since it uses less digits than its factorization.

6638535106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140169.

The product of its (nonzero) digits is 388800, while the sum is 43.

The square root of 6638535106 is about 81477.2060517541. The cubic root of 6638535106 is about 1879.4210441870.

The spelling of 6638535106 in words is "six billion, six hundred thirty-eight million, five hundred thirty-five thousand, one hundred six".