816296820613 has 32 divisors (see below), whose sum is σ = 854818342400. Its totient is φ = 778898405376.

The previous prime is 816296820601. The next prime is 816296820671. The reversal of 816296820613 is 316028692618.

It is a 8-Lehmer number, since φ(816296820613) divides (816296820613-1)⁸.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-816296820613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816296820683) 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 31 ways as a sum of consecutive naturals, for example, 404707381 + ... + 404709397.

It is an arithmetic number, because the mean of its divisors is an integer number (26713073200).

Almost surely, 2^816296820613 is an apocalyptic number.

816296820613 is the 482937-th centered heptagonal number.

It is an amenable number.

816296820613 is a deficient number, since it is larger than the sum of its proper divisors (38521521787).

816296820613 is a wasteful number, since it uses less digits than its factorization.

816296820613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3341.

The product of its (nonzero) digits is 1492992, while the sum is 52.

The spelling of 816296820613 in words is "eight hundred sixteen billion, two hundred ninety-six million, eight hundred twenty thousand, six hundred thirteen".