43656341481 has 27 divisors (see below), whose sum is σ = 63539942583. Its totient is φ = 28884003840.

The previous prime is 43656341471. The next prime is 43656341489. The reversal of 43656341481 is 18414365634.

The square root of 43656341481 is 208941.

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

43656341481 is a `hidden beast` number, since 4 + 3 + 6 + 5 + 634 + 1 + 4 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 42979509225 + 676832256 = 207315^2 + 26016^2 .

It is not a de Polignac number, because 43656341481 - 2⁷ = 43656341353 is a prime.

It is a super-2 number, since 2×43656341481² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (43656341489) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 161093376 + ... + 161093646.

Almost surely, 2^43656341481 is an apocalyptic number.

43656341481 is the 208941-st square number.

43656341481 is the 104471-st centered octagonal number.

It is an amenable number.

43656341481 is a deficient number, since it is larger than the sum of its proper divisors (19883601102).

43656341481 is an frugal number, since it uses more digits than its factorization.

43656341481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062 (or 531 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The spelling of 43656341481 in words is "forty-three billion, six hundred fifty-six million, three hundred forty-one thousand, four hundred eighty-one".