3630973681 has 4 divisors (see below), whose sum is σ = 3756179700. Its totient is φ = 3505767664.

The previous prime is 3630973669. The next prime is 3630973691. The reversal of 3630973681 is 1863790363.

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 2960992225 + 669981456 = 54415^2 + 25884^2 .

It is a cyclic number.

It is not a de Polignac number, because 3630973681 - 2⁷ = 3630973553 is a prime.

It is a super-2 number, since 2×3630973681² = 26367939744229379522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3630973601) 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, 62602966 + ... + 62603023.

It is an arithmetic number, because the mean of its divisors is an integer number (939044925).

Almost surely, 2^3630973681 is an apocalyptic number.

It is an amenable number.

3630973681 is a deficient number, since it is larger than the sum of its proper divisors (125206019).

3630973681 is a wasteful number, since it uses less digits than its factorization.

3630973681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125206018.

The product of its (nonzero) digits is 489888, while the sum is 46.

The square root of 3630973681 is about 60257.5611935963. The cubic root of 3630973681 is about 1537.0017677150.

The spelling of 3630973681 in words is "three billion, six hundred thirty million, nine hundred seventy-three thousand, six hundred eighty-one".