43409497681 has 16 divisors (see below), whose sum is σ = 47583132480. Its totient is φ = 39273925120.

The previous prime is 43409497631. The next prime is 43409497693. The reversal of 43409497681 is 18679490434.

It is a cyclic number.

It is not a de Polignac number, because 43409497681 - 2¹⁵ = 43409464913 is a prime.

It is a super-2 number, since 2×43409497681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43409497631) 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 15 ways as a sum of consecutive naturals, for example, 7914366 + ... + 7919848.

It is an arithmetic number, because the mean of its divisors is an integer number (2973945780).

Almost surely, 2^43409497681 is an apocalyptic number.

It is an amenable number.

43409497681 is a deficient number, since it is larger than the sum of its proper divisors (4173634799).

43409497681 is a wasteful number, since it uses less digits than its factorization.

43409497681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8816.

The product of its (nonzero) digits is 5225472, while the sum is 55.

The spelling of 43409497681 in words is "forty-three billion, four hundred nine million, four hundred ninety-seven thousand, six hundred eighty-one".