1638652107 has 16 divisors (see below), whose sum is σ = 2200822272. Its totient is φ = 1084483680.

The previous prime is 1638652073. The next prime is 1638652111. The reversal of 1638652107 is 7012568361.

It is not a de Polignac number, because 1638652107 - 2¹⁰ = 1638651083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1638652307) 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 15 ways as a sum of consecutive naturals, for example, 287358 + ... + 293004.

It is an arithmetic number, because the mean of its divisors is an integer number (137551392).

Almost surely, 2^1638652107 is an apocalyptic number.

1638652107 is a deficient number, since it is larger than the sum of its proper divisors (562170165).

1638652107 is a wasteful number, since it uses less digits than its factorization.

1638652107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6338.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 1638652107 is about 40480.2681191713. The cubic root of 1638652107 is about 1178.9505432690.

The spelling of 1638652107 in words is "one billion, six hundred thirty-eight million, six hundred fifty-two thousand, one hundred seven".