3556949761 has 2 divisors, whose sum is σ = 3556949762. Its totient is φ = 3556949760.

The previous prime is 3556949743. The next prime is 3556949791. The reversal of 3556949761 is 1679496553.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3439118736 + 117831025 = 58644^2 + 10855^2 .

It is a cyclic number.

It is not a de Polignac number, because 3556949761 - 2¹⁷ = 3556818689 is a prime.

It is a super-4 number, since 4×3556949761⁴ (a number of 39 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (3556949791) 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, 1778474880 + 1778474881.

It is an arithmetic number, because the mean of its divisors is an integer number (1778474881).

Almost surely, 2^3556949761 is an apocalyptic number.

It is an amenable number.

3556949761 is a deficient number, since it is larger than the sum of its proper divisors (1).

3556949761 is an equidigital number, since it uses as much as digits as its factorization.

3556949761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6123600, while the sum is 55.

The square root of 3556949761 is about 59640.1690222286. The cubic root of 3556949761 is about 1526.4851265217.

The spelling of 3556949761 in words is "three billion, five hundred fifty-six million, nine hundred forty-nine thousand, seven hundred sixty-one".