3261645195181 has 16 divisors (see below), whose sum is σ = 3275464091328. Its totient is φ = 3247864048000.

The previous prime is 3261645195169. The next prime is 3261645195197. The reversal of 3261645195181 is 1815915461623.

It is a cyclic number.

It is not a de Polignac number, because 3261645195181 - 2²³ = 3261636806573 is a prime.

It is a super-2 number, since 2×3261645195181² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3261645195131) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 516325035 + ... + 516331351.

It is an arithmetic number, because the mean of its divisors is an integer number (204716505708).

Almost surely, 2^{3261645195181} is an apocalyptic number.

It is an amenable number.

3261645195181 is a deficient number, since it is larger than the sum of its proper divisors (13818896147).

3261645195181 is a wasteful number, since it uses less digits than its factorization.

3261645195181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8972.

The product of its digits is 1555200, while the sum is 52.

The spelling of 3261645195181 in words is "three trillion, two hundred sixty-one billion, six hundred forty-five million, one hundred ninety-five thousand, one hundred eighty-one".