3546781649 has 2 divisors, whose sum is σ = 3546781650. Its totient is φ = 3546781648.

The previous prime is 3546781643. The next prime is 3546781657. The reversal of 3546781649 is 9461876453.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2076442624 + 1470339025 = 45568^2 + 38345^2 .

It is a cyclic number.

It is not a de Polignac number, because 3546781649 - 2²⁰ = 3545733073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3546781649.

It is not a weakly prime, because it can be changed into another prime (3546781643) 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, 1773390824 + 1773390825.

It is an arithmetic number, because the mean of its divisors is an integer number (1773390825).

Almost surely, 2^3546781649 is an apocalyptic number.

It is an amenable number.

3546781649 is a deficient number, since it is larger than the sum of its proper divisors (1).

3546781649 is an equidigital number, since it uses as much as digits as its factorization.

3546781649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4354560, while the sum is 53.

The square root of 3546781649 is about 59554.8625134842. The cubic root of 3546781649 is about 1525.0291706684.

The spelling of 3546781649 in words is "three billion, five hundred forty-six million, seven hundred eighty-one thousand, six hundred forty-nine".