44640743689 has 2 divisors, whose sum is σ = 44640743690. Its totient is φ = 44640743688.

The previous prime is 44640743633. The next prime is 44640743761. The reversal of 44640743689 is 98634704644.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44546323600 + 94420089 = 211060^2 + 9717^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44640743689 is a prime.

It is not a weakly prime, because it can be changed into another prime (44640743089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22320371844 + 22320371845.

It is an arithmetic number, because the mean of its divisors is an integer number (22320371845).

Almost surely, 2^44640743689 is an apocalyptic number.

It is an amenable number.

44640743689 is a deficient number, since it is larger than the sum of its proper divisors (1).

44640743689 is an equidigital number, since it uses as much as digits as its factorization.

44640743689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13934592, while the sum is 55.

The spelling of 44640743689 in words is "forty-four billion, six hundred forty million, seven hundred forty-three thousand, six hundred eighty-nine".