43418473641 has 9 divisors (see below), whose sum is σ = 62716475991. Its totient is φ = 28945232352.

The previous prime is 43418473639. The next prime is 43418473667. The reversal of 43418473641 is 14637481434.

The square root of 43418473641 is 208371.

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

43418473641 is a `hidden beast` number, since 434 + 184 + 7 + 36 + 4 + 1 = 666.

43418473641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 5121549225 + 38296924416 = 71565^2 + 195696^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 43418473641 - 2¹ = 43418473639 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (43418473741) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 590385 + ... + 659841.

Almost surely, 2^43418473641 is an apocalyptic number.

43418473641 is the 208371-st square number.

43418473641 is the 104186-th centered octagonal number.

It is an amenable number.

43418473641 is a deficient number, since it is larger than the sum of its proper divisors (19298002350).

43418473641 is an frugal number, since it uses more digits than its factorization.

43418473641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138920 (or 69460 counting only the distinct ones).

The product of its digits is 774144, while the sum is 45.

The spelling of 43418473641 in words is "forty-three billion, four hundred eighteen million, four hundred seventy-three thousand, six hundred forty-one".