1990855199317 has 8 divisors (see below), whose sum is σ = 2044644043680. Its totient is φ = 1937734539600.

The previous prime is 1990855199303. The next prime is 1990855199357. The reversal of 1990855199317 is 7139915580991.

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 1990855199317 - 2³⁵ = 1956495460949 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 (1990855199357) 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, 167040123 + ... + 167052040.

It is an arithmetic number, because the mean of its divisors is an integer number (255580505460).

Almost surely, 2^{1990855199317} is an apocalyptic number.

It is an amenable number.

1990855199317 is a deficient number, since it is larger than the sum of its proper divisors (53788844363).

1990855199317 is a wasteful number, since it uses less digits than its factorization.

1990855199317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334092323.

The product of its (nonzero) digits is 27556200, while the sum is 67.

The spelling of 1990855199317 in words is "one trillion, nine hundred ninety billion, eight hundred fifty-five million, one hundred ninety-nine thousand, three hundred seventeen".