3599722561 has 4 divisors (see below), whose sum is σ = 3603565252. Its totient is φ = 3595879872.

The previous prime is 3599722559. The next prime is 3599722583. The reversal of 3599722561 is 1652279953.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 764799025 + 2834923536 = 27655^2 + 53244^2 .

It is a cyclic number.

It is not a de Polignac number, because 3599722561 - 2¹ = 3599722559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3599722531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1919940 + ... + 1921813.

It is an arithmetic number, because the mean of its divisors is an integer number (900891313).

Almost surely, 2^3599722561 is an apocalyptic number.

It is an amenable number.

3599722561 is a deficient number, since it is larger than the sum of its proper divisors (3842691).

3599722561 is an equidigital number, since it uses as much as digits as its factorization.

3599722561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3842690.

The product of its digits is 1020600, while the sum is 49.

The square root of 3599722561 is about 59997.6879637874. The cubic root of 3599722561 is about 1532.5794926418.

The spelling of 3599722561 in words is "three billion, five hundred ninety-nine million, seven hundred twenty-two thousand, five hundred sixty-one".