816197003885 has 8 divisors (see below), whose sum is σ = 979444183776. Its totient is φ = 652952417040.

The previous prime is 816197003873. The next prime is 816197003927. The reversal of 816197003885 is 588300791618.

816197003885 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 816197003885 - 2¹⁸ = 816196741741 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 816197003885.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128930 + ... + 1284140.

It is an arithmetic number, because the mean of its divisors is an integer number (122430522972).

Almost surely, 2^816197003885 is an apocalyptic number.

It is an amenable number.

816197003885 is a deficient number, since it is larger than the sum of its proper divisors (163247179891).

816197003885 is a wasteful number, since it uses less digits than its factorization.

816197003885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296523.

The product of its (nonzero) digits is 2903040, while the sum is 56.

The spelling of 816197003885 in words is "eight hundred sixteen billion, one hundred ninety-seven million, three thousand, eight hundred eighty-five".