813635408216 has 16 divisors (see below), whose sum is σ = 1566797915040. Its totient is φ = 395822630880.

The previous prime is 813635408207. The next prime is 813635408233. The reversal of 813635408216 is 612804536318.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1374383840 + ... + 1374384431.

It is an arithmetic number, because the mean of its divisors is an integer number (97924869690).

Almost surely, 2^813635408216 is an apocalyptic number.

It is an amenable number.

813635408216 is a deficient number, since it is larger than the sum of its proper divisors (753162506824).

813635408216 is a wasteful number, since it uses less digits than its factorization.

813635408216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2748768314 (or 2748768310 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 47.

The spelling of 813635408216 in words is "eight hundred thirteen billion, six hundred thirty-five million, four hundred eight thousand, two hundred sixteen".