3661555122 has 24 divisors (see below), whose sum is σ = 7934488380. Its totient is φ = 1220346240.

The previous prime is 3661555019. The next prime is 3661555123. The reversal of 3661555122 is 2215551663.

3661555122 is a `hidden beast` number, since 36 + 61 + 55 + 512 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3555856161 + 105698961 = 59631^2 + 10281^2 .

It is a super-2 number, since 2×3661555122² = 26813971822888869768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3661555123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 222622 + ... + 238502.

Almost surely, 2^3661555122 is an apocalyptic number.

3661555122 is an abundant number, since it is smaller than the sum of its proper divisors (4272933258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3661555122 is a wasteful number, since it uses less digits than its factorization.

3661555122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28698 (or 28695 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 3661555122 is about 60510.7851709098. The cubic root of 3661555122 is about 1541.3047808014.

The spelling of 3661555122 in words is "three billion, six hundred sixty-one million, five hundred fifty-five thousand, one hundred twenty-two".