4345285909781 has 2 divisors, whose sum is σ = 4345285909782. Its totient is φ = 4345285909780.

The previous prime is 4345285909777. The next prime is 4345285909841. The reversal of 4345285909781 is 1879095825434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3393166623025 + 952119286756 = 1842055^2 + 975766^2 .

It is a cyclic number.

It is not a de Polignac number, because 4345285909781 - 2² = 4345285909777 is a prime.

It is a super-2 number, since 2×4345285909781² (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 (4345285909681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2172642954890 + 2172642954891.

It is an arithmetic number, because the mean of its divisors is an integer number (2172642954891).

Almost surely, 2^{4345285909781} is an apocalyptic number.

It is an amenable number.

4345285909781 is a deficient number, since it is larger than the sum of its proper divisors (1).

4345285909781 is an equidigital number, since it uses as much as digits as its factorization.

4345285909781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87091200, while the sum is 65.

The spelling of 4345285909781 in words is "four trillion, three hundred forty-five billion, two hundred eighty-five million, nine hundred nine thousand, seven hundred eighty-one".