44677778909 has 2 divisors, whose sum is σ = 44677778910. Its totient is φ = 44677778908.

The previous prime is 44677778879. The next prime is 44677778917. The reversal of 44677778909 is 90987777644.

It is a happy number.

44677778909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44596147684 + 81631225 = 211178^2 + 9035^2 .

It is a cyclic number.

It is not a de Polignac number, because 44677778909 - 2¹⁶ = 44677713373 is a prime.

It is a super-2 number, since 2×44677778909² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44677778939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22338889454 + 22338889455.

It is an arithmetic number, because the mean of its divisors is an integer number (22338889455).

Almost surely, 2^44677778909 is an apocalyptic number.

It is an amenable number.

44677778909 is a deficient number, since it is larger than the sum of its proper divisors (1).

44677778909 is an equidigital number, since it uses as much as digits as its factorization.

44677778909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 149361408, while the sum is 68.

The spelling of 44677778909 in words is "forty-four billion, six hundred seventy-seven million, seven hundred seventy-eight thousand, nine hundred nine".