1990179827999 has 12 divisors (see below), whose sum is σ = 2306329820088. Its totient is φ = 1702827657600.

The previous prime is 1990179827947. The next prime is 1990179828019. The reversal of 1990179827999 is 9997289710991.

It is not a de Polignac number, because 1990179827999 - 2¹⁶ = 1990179762463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990179827939) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 313016612 + ... + 313022969.

It is an arithmetic number, because the mean of its divisors is an integer number (192194151674).

Almost surely, 2^{1990179827999} is an apocalyptic number.

1990179827999 is a deficient number, since it is larger than the sum of its proper divisors (316149992089).

1990179827999 is a wasteful number, since it uses less digits than its factorization.

1990179827999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626039626 (or 626039609 counting only the distinct ones).

The product of its (nonzero) digits is 416649744, while the sum is 80.

The spelling of 1990179827999 in words is "one trillion, nine hundred ninety billion, one hundred seventy-nine million, eight hundred twenty-seven thousand, nine hundred ninety-nine".