3261397612356 has 189 divisors, whose sum is σ = 8996761956091. Its totient is φ = 996182089344.

The previous prime is 3261397612337. The next prime is 3261397612379. The reversal of 3261397612356 is 6532167931623.

The square root of 3261397612356 is 1805934.

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

3261397612356 is a `hidden beast` number, since 3 + 2 + 6 + 13 + 9 + 7 + 612 + 3 + 5 + 6 = 666.

It can be written as a sum of positive squares in 10 ways, for example, as 713798557956 + 2547599054400 = 844866^2 + 1596120^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 23805821920 + ... + 23805822056.

Almost surely, 2^{3261397612356} is an apocalyptic number.

3261397612356 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

3261397612356 is the 1805934-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3261397612356

3261397612356 is an abundant number, since it is smaller than the sum of its proper divisors (5735364343735).

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

3261397612356 is an frugal number, since it uses more digits than its factorization.

3261397612356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362 (or 155 counting only the distinct ones).

The product of its digits is 7348320, while the sum is 54.

The spelling of 3261397612356 in words is "three trillion, two hundred sixty-one billion, three hundred ninety-seven million, six hundred twelve thousand, three hundred fifty-six".