1650018990 has 16 divisors (see below), whose sum is σ = 3960045648. Its totient is φ = 440005056.

The previous prime is 1650018973. The next prime is 1650018991. The reversal of 1650018990 is 998100561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1650018991) 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, 27500287 + ... + 27500346.

It is an arithmetic number, because the mean of its divisors is an integer number (247502853).

Almost surely, 2^1650018990 is an apocalyptic number.

1650018990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1650018990 is an abundant number, since it is smaller than the sum of its proper divisors (2310026658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1650018990 is a wasteful number, since it uses less digits than its factorization.

1650018990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55000643.

The product of its (nonzero) digits is 19440, while the sum is 39.

The square root of 1650018990 is about 40620.4257732486. The cubic root of 1650018990 is about 1181.6702837496.

The spelling of 1650018990 in words is "one billion, six hundred fifty million, eighteen thousand, nine hundred ninety".