3261115656 has 96 divisors (see below), whose sum is σ = 9273513600. Its totient is φ = 1033845120.

The previous prime is 3261115643. The next prime is 3261115681. The reversal of 3261115656 is 6565111623.

3261115656 is a `hidden beast` number, since 32 + 61 + 1 + 1 + 565 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 3261115656.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128241 + ... + 151551.

It is an arithmetic number, because the mean of its divisors is an integer number (96599100).

Almost surely, 2^3261115656 is an apocalyptic number.

3261115656 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3261115656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4636756800).

3261115656 is an abundant number, since it is smaller than the sum of its proper divisors (6012397944).

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

3261115656 is a wasteful number, since it uses less digits than its factorization.

3261115656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23419 (or 23412 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 3261115656 is about 57106.1787900399. The cubic root of 3261115656 is about 1482.9348350168.

The spelling of 3261115656 in words is "three billion, two hundred sixty-one million, one hundred fifteen thousand, six hundred fifty-six".