43685257141 has 4 divisors (see below), whose sum is σ = 43685759884. Its totient is φ = 43684754400.

The previous prime is 43685257129. The next prime is 43685257163. The reversal of 43685257141 is 14175258634.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 12644102916 + 31041154225 = 112446^2 + 176185^2 .

It is a 3-Lehmer number, since φ(43685257141) divides (43685257141-1)³.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43685257141 is a prime.

It is a deceptive number, since it divides R_43685257140.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43685257091 and 43685257100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43685257111) 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, 83790 + ... + 307231.

It is an arithmetic number, because the mean of its divisors is an integer number (10921439971).

Almost surely, 2^43685257141 is an apocalyptic number.

43685257141 is the 111721-st nonagonal number.

It is an amenable number.

43685257141 is a deficient number, since it is larger than the sum of its proper divisors (502743).

43685257141 is a wasteful number, since it uses less digits than its factorization.

43685257141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502742.

The product of its digits is 806400, while the sum is 46.

The spelling of 43685257141 in words is "forty-three billion, six hundred eighty-five million, two hundred fifty-seven thousand, one hundred forty-one".