43680238537 has 16 divisors (see below), whose sum is σ = 49568944320. Its totient is φ = 38157307200.

The previous prime is 43680238471. The next prime is 43680238571. The reversal of 43680238537 is 73583208634.

43680238537 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 43680238537 - 2¹⁵ = 43680205769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43680230537) 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, 138462 + ... + 326392.

It is an arithmetic number, because the mean of its divisors is an integer number (3098059020).

Almost surely, 2^43680238537 is an apocalyptic number.

It is an amenable number.

43680238537 is a deficient number, since it is larger than the sum of its proper divisors (5888705783).

43680238537 is a wasteful number, since it uses less digits than its factorization.

43680238537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188904.

The product of its (nonzero) digits is 2903040, while the sum is 49.

The spelling of 43680238537 in words is "forty-three billion, six hundred eighty million, two hundred thirty-eight thousand, five hundred thirty-seven".