1797381921105 has 24 divisors (see below), whose sum is σ = 3146308162920. Its totient is φ = 949112563200.

The previous prime is 1797381921077. The next prime is 1797381921113. The reversal of 1797381921105 is 5011291837971.

1797381921105 is a `hidden beast` number, since 1 + 79 + 7 + 381 + 92 + 1 + 105 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 794886366096 + 1002495555009 = 891564^2 + 1001247^2 .

It is not a de Polignac number, because 1797381921105 - 2¹⁹ = 1797381396817 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 197727240 + ... + 197736329.

It is an arithmetic number, because the mean of its divisors is an integer number (131096173455).

Almost surely, 2^{1797381921105} is an apocalyptic number.

1797381921105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1797381921105 is a deficient number, since it is larger than the sum of its proper divisors (1348926241815).

1797381921105 is a wasteful number, since it uses less digits than its factorization.

1797381921105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395463681 (or 395463678 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 54.

The spelling of 1797381921105 in words is "one trillion, seven hundred ninety-seven billion, three hundred eighty-one million, nine hundred twenty-one thousand, one hundred five".