3681722650 has 12 divisors (see below), whose sum is σ = 6848004222. Its totient is φ = 1472689040.

The previous prime is 3681722621. The next prime is 3681722659. The reversal of 3681722650 is 562271863.

3681722650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 1580142001 + 2101580649 = 39751^2 + 45843^2 .

It is not an unprimeable number, because it can be changed into a prime (3681722659) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36817177 + ... + 36817276.

Almost surely, 2^3681722650 is an apocalyptic number.

3681722650 is a deficient number, since it is larger than the sum of its proper divisors (3166281572).

3681722650 is a wasteful number, since it uses less digits than its factorization.

3681722650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73634465 (or 73634460 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 3681722650 is about 60677.2004133348. The cubic root of 3681722650 is about 1544.1293922386.

The spelling of 3681722650 in words is "three billion, six hundred eighty-one million, seven hundred twenty-two thousand, six hundred fifty".