1801665902490 has 32 divisors (see below), whose sum is σ = 4328120260800. Its totient is φ = 479986230144.

The previous prime is 1801665902473. The next prime is 1801665902497. The reversal of 1801665902490 is 942095661081.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1801665902497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28593664 + ... + 28656603.

It is an arithmetic number, because the mean of its divisors is an integer number (135253758150).

Almost surely, 2^{1801665902490} is an apocalyptic number.

1801665902490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1801665902490 is an abundant number, since it is smaller than the sum of its proper divisors (2526454358310).

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

1801665902490 is a wasteful number, since it uses less digits than its factorization.

1801665902490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57251326.

The product of its (nonzero) digits is 933120, while the sum is 51.

The spelling of 1801665902490 in words is "one trillion, eight hundred one billion, six hundred sixty-five million, nine hundred two thousand, four hundred ninety".