43855478761 has 4 divisors (see below), whose sum is σ = 44289691524. Its totient is φ = 43421266000.

The previous prime is 43855478749. The next prime is 43855478783. The reversal of 43855478761 is 16787455834.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43152168361 + 703310400 = 207731^2 + 26520^2 .

It is a cyclic number.

It is not a de Polignac number, because 43855478761 - 2¹⁵ = 43855445993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43855478696 and 43855478705.

It is not an unprimeable number, because it can be changed into a prime (43855478701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217106230 + ... + 217106431.

It is an arithmetic number, because the mean of its divisors is an integer number (11072422881).

Almost surely, 2^43855478761 is an apocalyptic number.

It is an amenable number.

43855478761 is a deficient number, since it is larger than the sum of its proper divisors (434212763).

43855478761 is a wasteful number, since it uses less digits than its factorization.

43855478761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434212762.

The product of its digits is 22579200, while the sum is 58.

The spelling of 43855478761 in words is "forty-three billion, eight hundred fifty-five million, four hundred seventy-eight thousand, seven hundred sixty-one".