3653075631721 has 8 divisors (see below), whose sum is σ = 3680062286760. Its totient is φ = 3626093641728.

The previous prime is 3653075631719. The next prime is 3653075631743. The reversal of 3653075631721 is 1271365703563.

3653075631721 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 4 ways, for example, as 80238493696 + 3572837138025 = 283264^2 + 1890195^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 3653075631721 - 2¹ = 3653075631719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3653075631791) 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, 413545 + ... + 2734441.

It is an arithmetic number, because the mean of its divisors is an integer number (460007785845).

Almost surely, 2^{3653075631721} is an apocalyptic number.

It is an amenable number.

3653075631721 is a deficient number, since it is larger than the sum of its proper divisors (26986655039).

3653075631721 is a wasteful number, since it uses less digits than its factorization.

3653075631721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2332523.

The product of its (nonzero) digits is 2381400, while the sum is 49.

The spelling of 3653075631721 in words is "three trillion, six hundred fifty-three billion, seventy-five million, six hundred thirty-one thousand, seven hundred twenty-one".