1990010165 has 48 divisors (see below), whose sum is σ = 2838179568. Its totient is φ = 1330560000.

The previous prime is 1990010159. The next prime is 1990010173. The reversal of 1990010165 is 5610100991.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 356718769 + 1633291396 = 18887^2 + 40414^2 .

It is not a de Polignac number, because 1990010165 - 2²⁴ = 1973232949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3310865 + ... + 3311465.

It is an arithmetic number, because the mean of its divisors is an integer number (59128741).

Almost surely, 2^1990010165 is an apocalyptic number.

It is an amenable number.

1990010165 is a deficient number, since it is larger than the sum of its proper divisors (848169403).

1990010165 is a wasteful number, since it uses less digits than its factorization.

1990010165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062 (or 1051 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 32.

The square root of 1990010165 is about 44609.5299795907. The cubic root of 1990010165 is about 1257.8198136010.

The spelling of 1990010165 in words is "one billion, nine hundred ninety million, ten thousand, one hundred sixty-five".