3681355641 has 4 divisors (see below), whose sum is σ = 4908474192. Its totient is φ = 2454237092.

The previous prime is 3681355619. The next prime is 3681355649. The reversal of 3681355641 is 1465531863.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3681355641 - 2⁶ = 3681355577 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3681355593 and 3681355602.

It is not an unprimeable number, because it can be changed into a prime (3681355649) 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, 613559271 + ... + 613559276.

It is an arithmetic number, because the mean of its divisors is an integer number (1227118548).

Almost surely, 2^3681355641 is an apocalyptic number.

It is an amenable number.

3681355641 is a deficient number, since it is larger than the sum of its proper divisors (1227118551).

3681355641 is a wasteful number, since it uses less digits than its factorization.

3681355641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227118550.

The product of its digits is 259200, while the sum is 42.

The square root of 3681355641 is about 60674.1760636269. The cubic root of 3681355641 is about 1544.0780821799.

The spelling of 3681355641 in words is "three billion, six hundred eighty-one million, three hundred fifty-five thousand, six hundred forty-one".