4581685369 has 2 divisors, whose sum is σ = 4581685370. Its totient is φ = 4581685368.

The previous prime is 4581685333. The next prime is 4581685397. The reversal of 4581685369 is 9635861854.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3059749225 + 1521936144 = 55315^2 + 39012^2 .

It is a cyclic number.

It is not a de Polignac number, because 4581685369 - 2²¹ = 4579588217 is a prime.

It is a super-2 number, since 2×4581685369² = 41983681641017332322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4581685319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2290842684 + 2290842685.

It is an arithmetic number, because the mean of its divisors is an integer number (2290842685).

Almost surely, 2^4581685369 is an apocalyptic number.

It is an amenable number.

4581685369 is a deficient number, since it is larger than the sum of its proper divisors (1).

4581685369 is an equidigital number, since it uses as much as digits as its factorization.

4581685369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6220800, while the sum is 55.

The square root of 4581685369 is about 67688.1479211834. The cubic root of 4581685369 is about 1660.8933799790.

The spelling of 4581685369 in words is "four billion, five hundred eighty-one million, six hundred eighty-five thousand, three hundred sixty-nine".