10785856321 has 2 divisors, whose sum is σ = 10785856322. Its totient is φ = 10785856320.

The previous prime is 10785856297. The next prime is 10785856327. The reversal of 10785856321 is 12365858701.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7385683600 + 3400172721 = 85940^2 + 58311^2 .

It is a cyclic number.

It is not a de Polignac number, because 10785856321 - 2²⁷ = 10651638593 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (10785856327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5392928160 + 5392928161.

It is an arithmetic number, because the mean of its divisors is an integer number (5392928161).

Almost surely, 2^10785856321 is an apocalyptic number.

It is an amenable number.

10785856321 is a deficient number, since it is larger than the sum of its proper divisors (1).

10785856321 is an equidigital number, since it uses as much as digits as its factorization.

10785856321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 10785856321 in words is "ten billion, seven hundred eighty-five million, eight hundred fifty-six thousand, three hundred twenty-one".