2196722644 has 6 divisors (see below), whose sum is σ = 3844264634. Its totient is φ = 1098361320.

The previous prime is 2196722621. The next prime is 2196722659. The reversal of 2196722644 is 4462276912.

It can be written as a sum of positive squares in only one way, i.e., 1813737744 + 382984900 = 42588^2 + 19570^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2196722644.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274590327 + ... + 274590334.

Almost surely, 2^2196722644 is an apocalyptic number.

It is an amenable number.

2196722644 is a deficient number, since it is larger than the sum of its proper divisors (1647541990).

2196722644 is a wasteful number, since it uses less digits than its factorization.

2196722644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549180665 (or 549180663 counting only the distinct ones).

The product of its digits is 290304, while the sum is 43.

The square root of 2196722644 is about 46869.2078448100. The cubic root of 2196722644 is about 1299.9452923723.

The spelling of 2196722644 in words is "two billion, one hundred ninety-six million, seven hundred twenty-two thousand, six hundred forty-four".