40444399613549 has 2 divisors, whose sum is σ = 40444399613550. Its totient is φ = 40444399613548.

The previous prime is 40444399613537. The next prime is 40444399613561. The reversal of 40444399613549 is 94531699344404.

It is a balanced prime because it is at equal distance from previous prime (40444399613537) and next prime (40444399613561).

It can be written as a sum of positive squares in only one way, i.e., 28777270158025 + 11667129455524 = 5364445^2 + 3415718^2 .

It is a cyclic number.

It is not a de Polignac number, because 40444399613549 - 2⁴ = 40444399613533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40444399612549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20222199806774 + 20222199806775.

It is an arithmetic number, because the mean of its divisors is an integer number (20222199806775).

Almost surely, 2^{40444399613549} is an apocalyptic number.

It is an amenable number.

40444399613549 is a deficient number, since it is larger than the sum of its proper divisors (1).

40444399613549 is an equidigital number, since it uses as much as digits as its factorization.

40444399613549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 201553920, while the sum is 65.

The spelling of 40444399613549 in words is "forty trillion, four hundred forty-four billion, three hundred ninety-nine million, six hundred thirteen thousand, five hundred forty-nine".