43765392049 has 4 divisors (see below), whose sum is σ = 43767778660. Its totient is φ = 43763005440.

The previous prime is 43765392043. The next prime is 43765392089. The reversal of 43765392049 is 94029356734.

It is a happy number.

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 29158977600 + 14606414449 = 170760^2 + 120857^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43765392049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43765391987 and 43765392005.

It is not an unprimeable number, because it can be changed into a prime (43765392043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1165584 + ... + 1202545.

It is an arithmetic number, because the mean of its divisors is an integer number (10941944665).

Almost surely, 2^43765392049 is an apocalyptic number.

It is an amenable number.

43765392049 is a deficient number, since it is larger than the sum of its proper divisors (2386611).

43765392049 is a wasteful number, since it uses less digits than its factorization.

43765392049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2386610.

The product of its (nonzero) digits is 4898880, while the sum is 52.

The spelling of 43765392049 in words is "forty-three billion, seven hundred sixty-five million, three hundred ninety-two thousand, forty-nine".