3646581313 has 8 divisors (see below), whose sum is σ = 3717226728. Its totient is φ = 3576004224.

The previous prime is 3646581283. The next prime is 3646581347. The reversal of 3646581313 is 3131856463.

It can be written as a sum of positive squares in 4 ways, for example, as 588159504 + 3058421809 = 24252^2 + 55303^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3646581313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3646581383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98131 + ... + 130087.

It is an arithmetic number, because the mean of its divisors is an integer number (464653341).

Almost surely, 2^3646581313 is an apocalyptic number.

It is an amenable number.

3646581313 is a deficient number, since it is larger than the sum of its proper divisors (70645415).

3646581313 is a wasteful number, since it uses less digits than its factorization.

3646581313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34163.

The product of its digits is 155520, while the sum is 40.

The square root of 3646581313 is about 60386.9299848899. The cubic root of 3646581313 is about 1539.2008718659.

The spelling of 3646581313 in words is "three billion, six hundred forty-six million, five hundred eighty-one thousand, three hundred thirteen".