3653820481 has 4 divisors (see below), whose sum is σ = 3654037332. Its totient is φ = 3653603632.

The previous prime is 3653820473. The next prime is 3653820497. The reversal of 3653820481 is 1840283563.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1177862400 + 2475958081 = 34320^2 + 49759^2 .

It is a cyclic number.

It is not a de Polignac number, because 3653820481 - 2³ = 3653820473 is a prime.

It is a super-2 number, since 2×3653820481² = 26700808214750142722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3653827481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80806 + ... + 117631.

It is an arithmetic number, because the mean of its divisors is an integer number (913509333).

Almost surely, 2^3653820481 is an apocalyptic number.

It is an amenable number.

3653820481 is a deficient number, since it is larger than the sum of its proper divisors (216851).

3653820481 is a wasteful number, since it uses less digits than its factorization.

3653820481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216850.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 3653820481 is about 60446.8401241951. The cubic root of 3653820481 is about 1540.2187355856.

The spelling of 3653820481 in words is "three billion, six hundred fifty-three million, eight hundred twenty thousand, four hundred eighty-one".