3521901906 has 48 divisors (see below), whose sum is σ = 7867214784. Its totient is φ = 1137838752.

The previous prime is 3521901893. The next prime is 3521901913. The reversal of 3521901906 is 6091091253.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 165105 + ... + 185211.

It is an arithmetic number, because the mean of its divisors is an integer number (163900308).

Almost surely, 2^3521901906 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3521901906, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3933607392).

3521901906 is an abundant number, since it is smaller than the sum of its proper divisors (4345312878).

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

3521901906 is a wasteful number, since it uses less digits than its factorization.

3521901906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20415 (or 20412 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 3521901906 is about 59345.6140418144. The cubic root of 3521901906 is about 1521.4549068736.

The spelling of 3521901906 in words is "three billion, five hundred twenty-one million, nine hundred one thousand, nine hundred six".