3531085866 has 128 divisors (see below), whose sum is σ = 9823334400. Its totient is φ = 913394880.

The previous prime is 3531085853. The next prime is 3531085871. The reversal of 3531085866 is 6685801353.

3531085866 is a `hidden beast` number, since 3 + 53 + 10 + 8 + 586 + 6 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1091940 + ... + 1095168.

It is an arithmetic number, because the mean of its divisors is an integer number (76744800).

Almost surely, 2^3531085866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3531085866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4911667200).

3531085866 is an abundant number, since it is smaller than the sum of its proper divisors (6292248534).

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

3531085866 is a wasteful number, since it uses less digits than its factorization.

3531085866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3521 (or 3515 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The square root of 3531085866 is about 59422.9405701199. The cubic root of 3531085866 is about 1522.7762434033.

The spelling of 3531085866 in words is "three billion, five hundred thirty-one million, eighty-five thousand, eight hundred sixty-six".