1638090009166 has 8 divisors (see below), whose sum is σ = 2646145399464. Its totient is φ = 756041542680.

The previous prime is 1638090009091. The next prime is 1638090009167. The reversal of 1638090009166 is 6619000908361.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1638090009167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31501730920 + ... + 31501730971.

It is an arithmetic number, because the mean of its divisors is an integer number (330768174933).

Almost surely, 2^{1638090009166} is an apocalyptic number.

1638090009166 is a deficient number, since it is larger than the sum of its proper divisors (1008055390298).

1638090009166 is a wasteful number, since it uses less digits than its factorization.

1638090009166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63003461906.

The product of its (nonzero) digits is 419904, while the sum is 49.

The spelling of 1638090009166 in words is "one trillion, six hundred thirty-eight billion, ninety million, nine thousand, one hundred sixty-six".