44215621609 has 2 divisors, whose sum is σ = 44215621610. Its totient is φ = 44215621608.

The previous prime is 44215621607. The next prime is 44215621633. The reversal of 44215621609 is 90612651244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37836085225 + 6379536384 = 194515^2 + 79872^2 .

It is a cyclic number.

It is not a de Polignac number, because 44215621609 - 2¹ = 44215621607 is a prime.

Together with 44215621607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (44215621607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22107810804 + 22107810805.

It is an arithmetic number, because the mean of its divisors is an integer number (22107810805).

Almost surely, 2^44215621609 is an apocalyptic number.

It is an amenable number.

44215621609 is a deficient number, since it is larger than the sum of its proper divisors (1).

44215621609 is an equidigital number, since it uses as much as digits as its factorization.

44215621609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 44215621609 in words is "forty-four billion, two hundred fifteen million, six hundred twenty-one thousand, six hundred nine".