43850012639 has 4 divisors (see below), whose sum is σ = 43864257360. Its totient is φ = 43835767920.

The previous prime is 43850012611. The next prime is 43850012659. The reversal of 43850012639 is 93621005834.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43850012639 - 2²⁸ = 43581577183 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43850012596 and 43850012605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43850012659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7117742 + ... + 7123899.

It is an arithmetic number, because the mean of its divisors is an integer number (10966064340).

Almost surely, 2^43850012639 is an apocalyptic number.

43850012639 is a deficient number, since it is larger than the sum of its proper divisors (14244721).

43850012639 is a wasteful number, since it uses less digits than its factorization.

43850012639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14244720.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 43850012639 in words is "forty-three billion, eight hundred fifty million, twelve thousand, six hundred thirty-nine".