1990487349646 has 8 divisors (see below), whose sum is σ = 2986024955040. Its totient is φ = 995145697968.

The previous prime is 1990487349629. The next prime is 1990487349713. The reversal of 1990487349646 is 6469437840991.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48963031 + ... + 49003666.

It is an arithmetic number, because the mean of its divisors is an integer number (373253119380).

Almost surely, 2^{1990487349646} is an apocalyptic number.

1990487349646 is a deficient number, since it is larger than the sum of its proper divisors (995537605394).

1990487349646 is a wasteful number, since it uses less digits than its factorization.

1990487349646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97976858.

The product of its (nonzero) digits is 282175488, while the sum is 70.

The spelling of 1990487349646 in words is "one trillion, nine hundred ninety billion, four hundred eighty-seven million, three hundred forty-nine thousand, six hundred forty-six".