3561775641 has 6 divisors (see below), whose sum is σ = 5144787050. Its totient is φ = 2374517088.

The previous prime is 3561775603. The next prime is 3561775681. The reversal of 3561775641 is 1465771653.

It can be written as a sum of positive squares in only one way, i.e., 3317760000 + 244015641 = 57600^2 + 15621^2 .

It is not a de Polignac number, because 3561775641 - 2⁷ = 3561775513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3561775681) 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 in 5 ways as a sum of consecutive naturals, for example, 197876416 + ... + 197876433.

Almost surely, 2^3561775641 is an apocalyptic number.

It is an amenable number.

3561775641 is a deficient number, since it is larger than the sum of its proper divisors (1583011409).

3561775641 is a wasteful number, since it uses less digits than its factorization.

3561775641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395752855 (or 395752852 counting only the distinct ones).

The product of its digits is 529200, while the sum is 45.

The square root of 3561775641 is about 59680.6136111217. The cubic root of 3561775641 is about 1527.1751657869.

The spelling of 3561775641 in words is "three billion, five hundred sixty-one million, seven hundred seventy-five thousand, six hundred forty-one".