4668409781 has 6 divisors (see below), whose sum is σ = 5430599190. Its totient is φ = 4001494056.

The previous prime is 4668409777. The next prime is 4668409789. The reversal of 4668409781 is 1879048664.

It can be written as a sum of positive squares in only one way, i.e., 3508666756 + 1159743025 = 59234^2 + 34055^2 .

It is not a de Polignac number, because 4668409781 - 2² = 4668409777 is a prime.

It is a super-2 number, since 2×4668409781² = 43588099766672935922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4668409789) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 47636786 + ... + 47636883.

It is an arithmetic number, because the mean of its divisors is an integer number (905099865).

Almost surely, 2^4668409781 is an apocalyptic number.

It is an amenable number.

4668409781 is a deficient number, since it is larger than the sum of its proper divisors (762189409).

4668409781 is an equidigital number, since it uses as much as digits as its factorization.

4668409781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95273683 (or 95273676 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 53.

The square root of 4668409781 is about 68325.7622057742. The cubic root of 4668409781 is about 1671.3073512660.

The spelling of 4668409781 in words is "four billion, six hundred sixty-eight million, four hundred nine thousand, seven hundred eighty-one".