44108645921 has 2 divisors, whose sum is σ = 44108645922. Its totient is φ = 44108645920.

The previous prime is 44108645891. The next prime is 44108645923. The reversal of 44108645921 is 12954680144.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29234160400 + 14874485521 = 170980^2 + 121961^2 .

It is a cyclic number.

It is not a de Polignac number, because 44108645921 - 2⁶ = 44108645857 is a prime.

It is a Sophie Germain prime.

Together with 44108645923, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (44108645923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22054322960 + 22054322961.

It is an arithmetic number, because the mean of its divisors is an integer number (22054322961).

Almost surely, 2^44108645921 is an apocalyptic number.

It is an amenable number.

44108645921 is a deficient number, since it is larger than the sum of its proper divisors (1).

44108645921 is an equidigital number, since it uses as much as digits as its factorization.

44108645921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 276480, while the sum is 44.

The spelling of 44108645921 in words is "forty-four billion, one hundred eight million, six hundred forty-five thousand, nine hundred twenty-one".