326536663551664 has 80 divisors (see below), whose sum is σ = 648964301592640. Its totient is φ = 159111483079680.

The previous prime is 326536663551647. The next prime is 326536663551733. The reversal of 326536663551664 is 466155366635623.

It is a super-2 number, since 2×326536663551664² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 326536663551664.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3077955229 + ... + 3078061315.

It is an arithmetic number, because the mean of its divisors is an integer number (8112053769908).

Almost surely, 2^{326536663551664} is an apocalyptic number.

It is an amenable number.

326536663551664 is a deficient number, since it is larger than the sum of its proper divisors (322427638040976).

326536663551664 is a wasteful number, since it uses less digits than its factorization.

326536663551664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135198 (or 135192 counting only the distinct ones).

The product of its digits is 1259712000, while the sum is 67.

The spelling of 326536663551664 in words is "three hundred twenty-six trillion, five hundred thirty-six billion, six hundred sixty-three million, five hundred fifty-one thousand, six hundred sixty-four".