4345285909681 has 2 divisors, whose sum is σ = 4345285909682. Its totient is φ = 4345285909680.

The previous prime is 4345285909673. The next prime is 4345285909703. The reversal of 4345285909681 is 1869095825434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4159560250000 + 185725659681 = 2039500^2 + 430959^2 .

It is a cyclic number.

It is not a de Polignac number, because 4345285909681 - 2³ = 4345285909673 is a prime.

It is a super-3 number, since 3×4345285909681³ (a number of 39 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (4345285909631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2172642954840 + 2172642954841.

It is an arithmetic number, because the mean of its divisors is an integer number (2172642954841).

Almost surely, 2^{4345285909681} is an apocalyptic number.

It is an amenable number.

4345285909681 is a deficient number, since it is larger than the sum of its proper divisors (1).

4345285909681 is an equidigital number, since it uses as much as digits as its factorization.

4345285909681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 74649600, while the sum is 64.

The spelling of 4345285909681 in words is "four trillion, three hundred forty-five billion, two hundred eighty-five million, nine hundred nine thousand, six hundred eighty-one".