1781996795197 has 8 divisors (see below), whose sum is σ = 1839555378432. Its totient is φ = 1724442888000.

The previous prime is 1781996795191. The next prime is 1781996795207. The reversal of 1781996795197 is 7915976991871.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1781996795197 - 2¹⁹ = 1781996270909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1781996795191) 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, 386188 + ... + 1926949.

It is an arithmetic number, because the mean of its divisors is an integer number (229944422304).

Almost surely, 2^{1781996795197} is an apocalyptic number.

It is an amenable number.

1781996795197 is a deficient number, since it is larger than the sum of its proper divisors (57558583235).

1781996795197 is a wasteful number, since it uses less digits than its factorization.

1781996795197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2338019.

The product of its digits is 540101520, while the sum is 79.

The spelling of 1781996795197 in words is "one trillion, seven hundred eighty-one billion, nine hundred ninety-six million, seven hundred ninety-five thousand, one hundred ninety-seven".