3621981264 has 40 divisors (see below), whose sum is σ = 10207403232. Its totient is φ = 1097569920.

The previous prime is 3621981217. The next prime is 3621981277. The reversal of 3621981264 is 4621891263.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3429379 + ... + 3430434.

Almost surely, 2^3621981264 is an apocalyptic number.

It is an amenable number.

3621981264 is an abundant number, since it is smaller than the sum of its proper divisors (6585421968).

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

3621981264 is a wasteful number, since it uses less digits than its factorization.

3621981264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6859835 (or 6859829 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 3621981264 is about 60182.8984346882. The cubic root of 3621981264 is about 1535.7318800125.

Subtracting 3621981264 from its reverse (4621891263), we obtain a palindrome (999909999).

The spelling of 3621981264 in words is "three billion, six hundred twenty-one million, nine hundred eighty-one thousand, two hundred sixty-four".