326251161856 has 81 divisors (see below), whose sum is σ = 675006729033. Its totient is φ = 157372615680.

The previous prime is 326251161811. The next prime is 326251161869. The reversal of 326251161856 is 658161152623.

The square root of 326251161856 is 571184.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 171078195456 + 155172966400 = 413616^2 + 393920^2 .

It is a super-2 number, since 2×326251161856² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 265028761 + ... + 265029991.

Almost surely, 2^326251161856 is an apocalyptic number.

326251161856 is the 571184-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 326251161856

326251161856 is an abundant number, since it is smaller than the sum of its proper divisors (348755567177).

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

326251161856 is an frugal number, since it uses more digits than its factorization.

326251161856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2536 (or 1262 counting only the distinct ones).

The product of its digits is 518400, while the sum is 46.

The spelling of 326251161856 in words is "three hundred twenty-six billion, two hundred fifty-one million, one hundred sixty-one thousand, eight hundred fifty-six".