1638090009019 has 8 divisors (see below), whose sum is σ = 1666914719040. Its totient is φ = 1609300648200.

The previous prime is 1638090009013. The next prime is 1638090009091. The reversal of 1638090009019 is 9109000908361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1638090009019 - 2⁵ = 1638090008987 is a prime.

It is a super-2 number, since 2×1638090009019² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1638090009019.

It is not an unprimeable number, because it can be changed into a prime (1638090009013) 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, 8743797 + ... + 8929174.

It is an arithmetic number, because the mean of its divisors is an integer number (208364339880).

Almost surely, 2^{1638090009019} is an apocalyptic number.

1638090009019 is a deficient number, since it is larger than the sum of its proper divisors (28824710021).

1638090009019 is a wasteful number, since it uses less digits than its factorization.

1638090009019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17674601.

The product of its (nonzero) digits is 104976, while the sum is 46.

The spelling of 1638090009019 in words is "one trillion, six hundred thirty-eight billion, ninety million, nine thousand, nineteen".