1639980099 has 12 divisors (see below), whose sum is σ = 2369211936. Its totient is φ = 1093157712.

The previous prime is 1639980049. The next prime is 1639980103. The reversal of 1639980099 is 9900899361.

It is not a de Polignac number, because 1639980099 - 2¹² = 1639976003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1639980019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106294 + ... + 120740.

It is an arithmetic number, because the mean of its divisors is an integer number (197434328).

Almost surely, 2^1639980099 is an apocalyptic number.

1639980099 is a deficient number, since it is larger than the sum of its proper divisors (729231837).

1639980099 is a wasteful number, since it uses less digits than its factorization.

1639980099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27066 (or 27063 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 54.

The square root of 1639980099 is about 40496.6677518040. The cubic root of 1639980099 is about 1179.2689379085.

The spelling of 1639980099 in words is "one billion, six hundred thirty-nine million, nine hundred eighty thousand, ninety-nine".