43729911709 has 12 divisors (see below), whose sum is σ = 48071849308. Its totient is φ = 39750258240.

The previous prime is 43729911653. The next prime is 43729911727. The reversal of 43729911709 is 90711992734.

It can be written as a sum of positive squares in 2 ways, for example, as 7192736100 + 36537175609 = 84810^2 + 191147^2 .

It is not a de Polignac number, because 43729911709 - 2¹⁷ = 43729780637 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 (43729917709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2052817 + ... + 2074009.

Almost surely, 2^43729911709 is an apocalyptic number.

It is an amenable number.

43729911709 is a deficient number, since it is larger than the sum of its proper divisors (4341937599).

43729911709 is a wasteful number, since it uses less digits than its factorization.

43729911709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38268 (or 38257 counting only the distinct ones).

The product of its (nonzero) digits is 857304, while the sum is 52.

The spelling of 43729911709 in words is "forty-three billion, seven hundred twenty-nine million, nine hundred eleven thousand, seven hundred nine".