44015431661 has 2 divisors, whose sum is σ = 44015431662. Its totient is φ = 44015431660.

The previous prime is 44015431631. The next prime is 44015431717. The reversal of 44015431661 is 16613451044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38716465225 + 5298966436 = 196765^2 + 72794^2 .

It is a cyclic number.

It is not a de Polignac number, because 44015431661 - 2¹⁰ = 44015430637 is a prime.

It is a super-2 number, since 2×44015431661² (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 (44015431631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22007715830 + 22007715831.

It is an arithmetic number, because the mean of its divisors is an integer number (22007715831).

Almost surely, 2^44015431661 is an apocalyptic number.

It is an amenable number.

44015431661 is a deficient number, since it is larger than the sum of its proper divisors (1).

44015431661 is an equidigital number, since it uses as much as digits as its factorization.

44015431661 is an evil number, because the sum of its binary digits is even.

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

The spelling of 44015431661 in words is "forty-four billion, fifteen million, four hundred thirty-one thousand, six hundred sixty-one".