3651442643 has 16 divisors (see below), whose sum is σ = 3839447040. Its totient is φ = 3468518496.

The previous prime is 3651442633. The next prime is 3651442649. The reversal of 3651442643 is 3462441563.

It is a cyclic number.

It is not a de Polignac number, because 3651442643 - 2¹² = 3651438547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3651442597 and 3651442606.

It is not an unprimeable number, because it can be changed into a prime (3651442649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 761030 + ... + 765812.

It is an arithmetic number, because the mean of its divisors is an integer number (239965440).

Almost surely, 2^3651442643 is an apocalyptic number.

3651442643 is a deficient number, since it is larger than the sum of its proper divisors (188004397).

3651442643 is a wasteful number, since it uses less digits than its factorization.

3651442643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5306.

The product of its digits is 207360, while the sum is 38.

The square root of 3651442643 is about 60427.1680868796. The cubic root of 3651442643 is about 1539.8845479031.

The spelling of 3651442643 in words is "three billion, six hundred fifty-one million, four hundred forty-two thousand, six hundred forty-three".