3646551641 has 2 divisors, whose sum is σ = 3646551642. Its totient is φ = 3646551640.

The previous prime is 3646551637. The next prime is 3646551653. The reversal of 3646551641 is 1461556463.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1981585225 + 1664966416 = 44515^2 + 40804^2 .

It is a cyclic number.

It is not a de Polignac number, because 3646551641 - 2² = 3646551637 is a prime.

It is not a weakly prime, because it can be changed into another prime (3646551341) 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 as a sum of consecutive naturals, namely, 1823275820 + 1823275821.

It is an arithmetic number, because the mean of its divisors is an integer number (1823275821).

Almost surely, 2^3646551641 is an apocalyptic number.

It is an amenable number.

3646551641 is a deficient number, since it is larger than the sum of its proper divisors (1).

3646551641 is an equidigital number, since it uses as much as digits as its factorization.

3646551641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 259200, while the sum is 41.

The square root of 3646551641 is about 60386.6843020877. The cubic root of 3646551641 is about 1539.1966970614.

The spelling of 3646551641 in words is "three billion, six hundred forty-six million, five hundred fifty-one thousand, six hundred forty-one".