326481551636 has 12 divisors (see below), whose sum is σ = 589773125760. Its totient is φ = 157974944280.

The previous prime is 326481551611. The next prime is 326481551663. The reversal of 326481551636 is 636155184623.

It is a happy number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 1316457746 + ... + 1316457993.

It is an arithmetic number, because the mean of its divisors is an integer number (49147760480).

Almost surely, 2^326481551636 is an apocalyptic number.

It is an amenable number.

326481551636 is a deficient number, since it is larger than the sum of its proper divisors (263291574124).

326481551636 is a wasteful number, since it uses less digits than its factorization.

326481551636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2632915774 (or 2632915772 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 50.

The spelling of 326481551636 in words is "three hundred twenty-six billion, four hundred eighty-one million, five hundred fifty-one thousand, six hundred thirty-six".