43309256645993 has 16 divisors (see below), whose sum is σ = 46670375174976. Its totient is φ = 39952376425920.

The previous prime is 43309256645987. The next prime is 43309256646001. The reversal of 43309256645993 is 39954665290334.

It is a cyclic number.

It is not a de Polignac number, because 43309256645993 - 2¹⁴ = 43309256629609 is a prime.

It is a super-2 number, since 2×43309256645993² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (43309256645393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252000830 + ... + 252172632.

It is an arithmetic number, because the mean of its divisors is an integer number (2916898448436).

Almost surely, 2^{43309256645993} is an apocalyptic number.

It is an amenable number.

43309256645993 is a deficient number, since it is larger than the sum of its proper divisors (3361118528983).

43309256645993 is a wasteful number, since it uses less digits than its factorization.

43309256645993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184024.

The product of its (nonzero) digits is 566870400, while the sum is 68.

The spelling of 43309256645993 in words is "forty-three trillion, three hundred nine billion, two hundred fifty-six million, six hundred forty-five thousand, nine hundred ninety-three".