3610681561 has 16 divisors (see below), whose sum is σ = 3896322048. Its totient is φ = 3333484800.

The previous prime is 3610681559. The next prime is 3610681567. The reversal of 3610681561 is 1651860163.

It is a cyclic number.

It is not a de Polignac number, because 3610681561 - 2¹ = 3610681559 is a prime.

It is a super-3 number, since 3×3610681561³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3610681561.

It is not an unprimeable number, because it can be changed into a prime (3610681567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 392626 + ... + 401716.

It is an arithmetic number, because the mean of its divisors is an integer number (243520128).

Almost surely, 2^3610681561 is an apocalyptic number.

It is an amenable number.

3610681561 is a deficient number, since it is larger than the sum of its proper divisors (285640487).

3610681561 is a wasteful number, since it uses less digits than its factorization.

3610681561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9552.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 3610681561 is about 60088.9470784769. The cubic root of 3610681561 is about 1534.1331793519.

The spelling of 3610681561 in words is "three billion, six hundred ten million, six hundred eighty-one thousand, five hundred sixty-one".