3581242566 has 36 divisors (see below), whose sum is σ = 7876360548. Its totient is φ = 1084736400.

The previous prime is 3581242529. The next prime is 3581242579. The reversal of 3581242566 is 6652421853.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1611336 + ... + 1613556.

It is an arithmetic number, because the mean of its divisors is an integer number (218787793).

Almost surely, 2^3581242566 is an apocalyptic number.

3581242566 is an abundant number, since it is smaller than the sum of its proper divisors (4295117982).

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

3581242566 is an equidigital number, since it uses as much as digits as its factorization.

3581242566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4469 (or 2237 counting only the distinct ones).

The product of its digits is 345600, while the sum is 42.

The square root of 3581242566 is about 59843.4839059358. The cubic root of 3581242566 is about 1529.9523766628.

The spelling of 3581242566 in words is "three billion, five hundred eighty-one million, two hundred forty-two thousand, five hundred sixty-six".