1982801191385 has 16 divisors (see below), whose sum is σ = 2719482882816. Its totient is φ = 1359528763968.

The previous prime is 1982801191361. The next prime is 1982801191387. The reversal of 1982801191385 is 5831911082891.

It is a cyclic number.

It is not a de Polignac number, because 1982801191385 - 2⁶ = 1982801191321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1982801191385.

It is not an unprimeable number, because it can be changed into a prime (1982801191387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1760174 + ... + 2657783.

It is an arithmetic number, because the mean of its divisors is an integer number (169967680176).

Almost surely, 2^{1982801191385} is an apocalyptic number.

It is an amenable number.

1982801191385 is a deficient number, since it is larger than the sum of its proper divisors (736681691431).

1982801191385 is a wasteful number, since it uses less digits than its factorization.

1982801191385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4430792.

The product of its (nonzero) digits is 1244160, while the sum is 56.

The spelling of 1982801191385 in words is "one trillion, nine hundred eighty-two billion, eight hundred one million, one hundred ninety-one thousand, three hundred eighty-five".