44202123661 has 2 divisors, whose sum is σ = 44202123662. Its totient is φ = 44202123660.

The previous prime is 44202123653. The next prime is 44202123701. The reversal of 44202123661 is 16632120244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27293022436 + 16909101225 = 165206^2 + 130035^2 .

It is a cyclic number.

It is not a de Polignac number, because 44202123661 - 2³ = 44202123653 is a prime.

It is a super-2 number, since 2×44202123661² (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 (44202123061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22101061830 + 22101061831.

It is an arithmetic number, because the mean of its divisors is an integer number (22101061831).

Almost surely, 2^44202123661 is an apocalyptic number.

It is an amenable number.

44202123661 is a deficient number, since it is larger than the sum of its proper divisors (1).

44202123661 is an equidigital number, since it uses as much as digits as its factorization.

44202123661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 31.

The spelling of 44202123661 in words is "forty-four billion, two hundred two million, one hundred twenty-three thousand, six hundred sixty-one".