361561660 has 12 divisors (see below), whose sum is σ = 759279528. Its totient is φ = 144624656.

The previous prime is 361561639. The next prime is 361561687. The reversal of 361561660 is 66165163.

It is a super-3 number, since 3×361561660³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 9039022 + ... + 9039061.

It is an arithmetic number, because the mean of its divisors is an integer number (63273294).

Almost surely, 2^361561660 is an apocalyptic number.

It is an amenable number.

361561660 is an abundant number, since it is smaller than the sum of its proper divisors (397717868).

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

361561660 is a wasteful number, since it uses less digits than its factorization.

361561660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18078092 (or 18078090 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 361561660 is about 19014.7747817322. The cubic root of 361561660 is about 712.4058174473.

The spelling of 361561660 in words is "three hundred sixty-one million, five hundred sixty-one thousand, six hundred sixty".