3661863249 has 16 divisors (see below), whose sum is σ = 5470303680. Its totient is φ = 2159328960.

The previous prime is 3661863239. The next prime is 3661863253. The reversal of 3661863249 is 9423681663.

It is not a de Polignac number, because 3661863249 - 2¹¹ = 3661861201 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3661863198 and 3661863207.

It is not an unprimeable number, because it can be changed into a prime (3661863209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1498314 + ... + 1500755.

It is an arithmetic number, because the mean of its divisors is an integer number (341893980).

Almost surely, 2^3661863249 is an apocalyptic number.

It is an amenable number.

3661863249 is a deficient number, since it is larger than the sum of its proper divisors (1808440431).

3661863249 is a wasteful number, since it uses less digits than its factorization.

3661863249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2999120.

The product of its digits is 1119744, while the sum is 48.

The square root of 3661863249 is about 60513.3311676031. The cubic root of 3661863249 is about 1541.3480141892.

The spelling of 3661863249 in words is "three billion, six hundred sixty-one million, eight hundred sixty-three thousand, two hundred forty-nine".