3644351521 has 2 divisors, whose sum is σ = 3644351522. Its totient is φ = 3644351520.

The previous prime is 3644351507. The next prime is 3644351533. The reversal of 3644351521 is 1251534463.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2610085921 + 1034265600 = 51089^2 + 32160^2 .

It is a cyclic number.

It is not a de Polignac number, because 3644351521 - 2¹⁷ = 3644220449 is a prime.

It is not a weakly prime, because it can be changed into another prime (3644351551) 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 as a sum of consecutive naturals, namely, 1822175760 + 1822175761.

It is an arithmetic number, because the mean of its divisors is an integer number (1822175761).

Almost surely, 2^3644351521 is an apocalyptic number.

It is an amenable number.

3644351521 is a deficient number, since it is larger than the sum of its proper divisors (1).

3644351521 is an equidigital number, since it uses as much as digits as its factorization.

3644351521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 34.

The square root of 3644351521 is about 60368.4646235102. The cubic root of 3644351521 is about 1538.8870804651.

Adding to 3644351521 its reverse (1251534463), we get a palindrome (4895885984).

The spelling of 3644351521 in words is "three billion, six hundred forty-four million, three hundred fifty-one thousand, five hundred twenty-one".