5816850928661 has 2 divisors, whose sum is σ = 5816850928662. Its totient is φ = 5816850928660.

The previous prime is 5816850928639. The next prime is 5816850928687. The reversal of 5816850928661 is 1668290586185.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3309397680625 + 2507453248036 = 1819175^2 + 1583494^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5816850928661 is a prime.

It is a super-2 number, since 2×5816850928661² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5816850928621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2908425464330 + 2908425464331.

It is an arithmetic number, because the mean of its divisors is an integer number (2908425464331).

Almost surely, 2^{5816850928661} is an apocalyptic number.

It is an amenable number.

5816850928661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5816850928661 is an equidigital number, since it uses as much as digits as its factorization.

5816850928661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49766400, while the sum is 65.

The spelling of 5816850928661 in words is "five trillion, eight hundred sixteen billion, eight hundred fifty million, nine hundred twenty-eight thousand, six hundred sixty-one".