43685878505329 has 12 divisors (see below), whose sum is σ = 46485056126124. Its totient is φ = 41046784999424.

The previous prime is 43685878505309. The next prime is 43685878505369. The reversal of 43685878505329 is 92350587858634.

It can be written as a sum of positive squares in 6 ways, for example, as 36072265329 + 43649806240000 = 189927^2 + 6606800^2 .

It is not a de Polignac number, because 43685878505329 - 2⁷ = 43685878505201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43685878505309) 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, 127284112 + ... + 127626865.

It is an arithmetic number, because the mean of its divisors is an integer number (3873754677177).

Almost surely, 2^{43685878505329} is an apocalyptic number.

It is an amenable number.

43685878505329 is a deficient number, since it is larger than the sum of its proper divisors (2799177620795).

43685878505329 is a wasteful number, since it uses less digits than its factorization.

43685878505329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254911604 (or 254911587 counting only the distinct ones).

The product of its (nonzero) digits is 1741824000, while the sum is 73.

The spelling of 43685878505329 in words is "forty-three trillion, six hundred eighty-five billion, eight hundred seventy-eight million, five hundred five thousand, three hundred twenty-nine".