3665211541 has 4 divisors (see below), whose sum is σ = 3665360032. Its totient is φ = 3665063052.

The previous prime is 3665211479. The next prime is 3665211547. The reversal of 3665211541 is 1451125663.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1451125663 = 13 ⋅111625051.

It is a cyclic number.

It is not a de Polignac number, because 3665211541 - 2¹⁹ = 3664687253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3665211497 and 3665211506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3665211547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27345 + ... + 89878.

It is an arithmetic number, because the mean of its divisors is an integer number (916340008).

Almost surely, 2^3665211541 is an apocalyptic number.

It is an amenable number.

3665211541 is a deficient number, since it is larger than the sum of its proper divisors (148491).

3665211541 is a wasteful number, since it uses less digits than its factorization.

3665211541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148490.

The product of its digits is 21600, while the sum is 34.

The square root of 3665211541 is about 60540.9905848922. The cubic root of 3665211541 is about 1541.8176577094.

The spelling of 3665211541 in words is "three billion, six hundred sixty-five million, two hundred eleven thousand, five hundred forty-one".