3611820644 has 6 divisors (see below), whose sum is σ = 6320686134. Its totient is φ = 1805910320.

The previous prime is 3611820607. The next prime is 3611820661. The reversal of 3611820644 is 4460281163.

It can be written as a sum of positive squares in only one way, i.e., 3589447744 + 22372900 = 59912^2 + 4730^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 451477577 + ... + 451477584.

It is an arithmetic number, because the mean of its divisors is an integer number (1053447689).

Almost surely, 2^3611820644 is an apocalyptic number.

It is an amenable number.

3611820644 is a deficient number, since it is larger than the sum of its proper divisors (2708865490).

3611820644 is a wasteful number, since it uses less digits than its factorization.

3611820644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902955165 (or 902955163 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 3611820644 is about 60098.4246382549. The cubic root of 3611820644 is about 1534.2944897363.

The spelling of 3611820644 in words is "three billion, six hundred eleven million, eight hundred twenty thousand, six hundred forty-four".