3681452447 has 4 divisors (see below), whose sum is σ = 3686780856. Its totient is φ = 3676124040.

The previous prime is 3681452413. The next prime is 3681452449. The reversal of 3681452447 is 7442541863.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7442541863 = 61 ⋅122008883.

It is a cyclic number.

It is not a de Polignac number, because 3681452447 - 2²⁶ = 3614343583 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3681452398 and 3681452407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3681452449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2663168 + ... + 2664549.

It is an arithmetic number, because the mean of its divisors is an integer number (921695214).

Almost surely, 2^3681452447 is an apocalyptic number.

3681452447 is a deficient number, since it is larger than the sum of its proper divisors (5328409).

3681452447 is an equidigital number, since it uses as much as digits as its factorization.

3681452447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5328408.

The product of its digits is 645120, while the sum is 44.

The square root of 3681452447 is about 60674.9738112840. The cubic root of 3681452447 is about 1544.0916165703.

The spelling of 3681452447 in words is "three billion, six hundred eighty-one million, four hundred fifty-two thousand, four hundred forty-seven".