1803778016990 has 16 divisors (see below), whose sum is σ = 3266242352352. Its totient is φ = 717190779744.

The previous prime is 1803778016983. The next prime is 1803778017001. The reversal of 1803778016990 is 996108773081.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 540051629 + ... + 540054968.

It is an arithmetic number, because the mean of its divisors is an integer number (204140147022).

Almost surely, 2^{1803778016990} is an apocalyptic number.

1803778016990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1803778016990 is a deficient number, since it is larger than the sum of its proper divisors (1462464335362).

1803778016990 is a wasteful number, since it uses less digits than its factorization.

1803778016990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080106771.

The product of its (nonzero) digits is 4572288, while the sum is 59.

The spelling of 1803778016990 in words is "one trillion, eight hundred three billion, seven hundred seventy-eight million, sixteen thousand, nine hundred ninety".