816217685101 has 8 divisors (see below), whose sum is σ = 1004575612544. Its totient is φ = 645798607920.

The previous prime is 816217685081. The next prime is 816217685117. The reversal of 816217685101 is 101586712618.

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

It is a cyclic number.

It is not a de Polignac number, because 816217685101 - 2³⁷ = 678778731629 is a prime.

It is a super-2 number, since 2×816217685101² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816217685131) 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 7 ways as a sum of consecutive naturals, for example, 4484712465 + ... + 4484712646.

It is an arithmetic number, because the mean of its divisors is an integer number (125571951568).

Almost surely, 2^816217685101 is an apocalyptic number.

It is an amenable number.

816217685101 is a deficient number, since it is larger than the sum of its proper divisors (188357927443).

816217685101 is a wasteful number, since it uses less digits than its factorization.

816217685101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8969425131.

The product of its (nonzero) digits is 161280, while the sum is 46.

The spelling of 816217685101 in words is "eight hundred sixteen billion, two hundred seventeen million, six hundred eighty-five thousand, one hundred one".