3599405681 has 2 divisors, whose sum is σ = 3599405682. Its totient is φ = 3599405680.

The previous prime is 3599405659. The next prime is 3599405683. The reversal of 3599405681 is 1865049953.

It is a happy number.

3599405681 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3170253025 + 429152656 = 56305^2 + 20716^2 .

It is a cyclic number.

It is not a de Polignac number, because 3599405681 - 2⁶ = 3599405617 is a prime.

It is a super-2 number, since 2×3599405681² = 25911442512830147522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 3599405683, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3599405683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1799702840 + 1799702841.

It is an arithmetic number, because the mean of its divisors is an integer number (1799702841).

Almost surely, 2^3599405681 is an apocalyptic number.

It is an amenable number.

3599405681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3599405681 is an equidigital number, since it uses as much as digits as its factorization.

3599405681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1166400, while the sum is 50.

The square root of 3599405681 is about 59995.0471372429. The cubic root of 3599405681 is about 1532.5345208389.

The spelling of 3599405681 in words is "three billion, five hundred ninety-nine million, four hundred five thousand, six hundred eighty-one".