819881871353 has 4 divisors (see below), whose sum is σ = 824911821648. Its totient is φ = 814851921060.

The previous prime is 819881871349. The next prime is 819881871397. The reversal of 819881871353 is 353178188918.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 819881871353 - 2² = 819881871349 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (819881879353) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2514974903 + ... + 2514975228.

It is an arithmetic number, because the mean of its divisors is an integer number (206227955412).

Almost surely, 2^819881871353 is an apocalyptic number.

It is an amenable number.

819881871353 is a deficient number, since it is larger than the sum of its proper divisors (5029950295).

819881871353 is a wasteful number, since it uses less digits than its factorization.

819881871353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5029950294.

The product of its digits is 11612160, while the sum is 62.

The spelling of 819881871353 in words is "eight hundred nineteen billion, eight hundred eighty-one million, eight hundred seventy-one thousand, three hundred fifty-three".