44215123661 has 2 divisors, whose sum is σ = 44215123662. Its totient is φ = 44215123660.

The previous prime is 44215123637. The next prime is 44215123669. The reversal of 44215123661 is 16632151244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41373594025 + 2841529636 = 203405^2 + 53306^2 .

It is a cyclic number.

It is not a de Polignac number, because 44215123661 - 2⁶ = 44215123597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44215123669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22107561830 + 22107561831.

It is an arithmetic number, because the mean of its divisors is an integer number (22107561831).

Almost surely, 2^44215123661 is an apocalyptic number.

It is an amenable number.

44215123661 is a deficient number, since it is larger than the sum of its proper divisors (1).

44215123661 is an equidigital number, since it uses as much as digits as its factorization.

44215123661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 35.

The spelling of 44215123661 in words is "forty-four billion, two hundred fifteen million, one hundred twenty-three thousand, six hundred sixty-one".