40444399613573 has 2 divisors, whose sum is σ = 40444399613574. Its totient is φ = 40444399613572.

The previous prime is 40444399613561. The next prime is 40444399613593. The reversal of 40444399613573 is 37531699344404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25796312106049 + 14648087507524 = 5079007^2 + 3827282^2 .

It is a cyclic number.

It is not a de Polignac number, because 40444399613573 - 2¹⁰ = 40444399612549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40444399613533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20222199806786 + 20222199806787.

It is an arithmetic number, because the mean of its divisors is an integer number (20222199806787).

Almost surely, 2^{40444399613573} is an apocalyptic number.

It is an amenable number.

40444399613573 is a deficient number, since it is larger than the sum of its proper divisors (1).

40444399613573 is an equidigital number, since it uses as much as digits as its factorization.

40444399613573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 117573120, while the sum is 62.

The spelling of 40444399613573 in words is "forty trillion, four hundred forty-four billion, three hundred ninety-nine million, six hundred thirteen thousand, five hundred seventy-three".