43040378413 has 4 divisors (see below), whose sum is σ = 43435244380. Its totient is φ = 42645512448.

The previous prime is 43040378347. The next prime is 43040378429. The reversal of 43040378413 is 31487304034.

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 39371290084 + 3669088329 = 198422^2 + 60573^2 .

It is a cyclic number.

It is not a de Polignac number, because 43040378413 - 2³³ = 34450443821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43040328413) 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, 197432820 + ... + 197433037.

It is an arithmetic number, because the mean of its divisors is an integer number (10858811095).

Almost surely, 2^43040378413 is an apocalyptic number.

It is an amenable number.

43040378413 is a deficient number, since it is larger than the sum of its proper divisors (394865967).

43040378413 is a wasteful number, since it uses less digits than its factorization.

43040378413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394865966.

The product of its (nonzero) digits is 96768, while the sum is 37.

The spelling of 43040378413 in words is "forty-three billion, forty million, three hundred seventy-eight thousand, four hundred thirteen".