870843816819 has 16 divisors (see below), whose sum is σ = 1290336307840. Its totient is φ = 580473750600.

The previous prime is 870843816811. The next prime is 870843816823. The reversal of 870843816819 is 918618348078.

870843816819 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 870843816819 - 2³ = 870843816811 is a prime.

It is a super-2 number, since 2×870843816819² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (870843816811) 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, 2286457 + ... + 2639994.

It is an arithmetic number, because the mean of its divisors is an integer number (80646019240).

Almost surely, 2^870843816819 is an apocalyptic number.

870843816819 is a deficient number, since it is larger than the sum of its proper divisors (419492491021).

870843816819 is a wasteful number, since it uses less digits than its factorization.

870843816819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4933007 (or 4933001 counting only the distinct ones).

The product of its (nonzero) digits is 18579456, while the sum is 63.

The spelling of 870843816819 in words is "eight hundred seventy billion, eight hundred forty-three million, eight hundred sixteen thousand, eight hundred nineteen".