43681845405 has 64 divisors (see below), whose sum is σ = 80420014080. Its totient is φ = 20023776000.

The previous prime is 43681845401. The next prime is 43681845451. The reversal of 43681845405 is 50454818634.

It is not a de Polignac number, because 43681845405 - 2² = 43681845401 is a prime.

It is a super-2 number, since 2×43681845405² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43681845401) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1563055 + ... + 1590755.

It is an arithmetic number, because the mean of its divisors is an integer number (1256562720).

Almost surely, 2^43681845405 is an apocalyptic number.

It is an amenable number.

43681845405 is a deficient number, since it is larger than the sum of its proper divisors (36738168675).

43681845405 is a wasteful number, since it uses less digits than its factorization.

43681845405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28242.

The product of its (nonzero) digits is 1843200, while the sum is 48.

The spelling of 43681845405 in words is "forty-three billion, six hundred eighty-one million, eight hundred forty-five thousand, four hundred five".